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The price of shirts at Primark is defined as Euro (100+10x

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The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 18:16
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GMATBusters’ Quant Quiz Question -4


The price of shirts at Primark is defined as Euro (100+10x^2), where x is the number of shirts purchased. Bob purchased 5 shirts from the above shop. The average price of the shirt is:
A. 40
B. 50
C. 60
D. 70
E. 75

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The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 18:16
The total price paid for 5 shirts can be found by putting x = 5 in cost function (100+10x^2),
Total price = 100+10(5^2)= 350
Average price per shirt = total amount paid/no of shirts = 350/5 = 70
Answer D
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 18:25
The price of shirts at Primark is defined as Euro (100+10x^2), where x is the number of shirts purchased. Bob purchased 5 shirts from the above shop. The average price of the shirt is:
A. 40
B. 50
C. 60
D. 70
E. 75

Price for 5 shirts = \((100+10x^2)\) = \((100+10*5^2)\)=350

\(Average for 5 shirts = [m]\frac{Total}{5}\)[/m] = \(\frac{350}{5}\) = 70 -> Answer D
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 18:25
Total price for 5 shirts =100+10x^2
=100+10×25=350

Average price =350/5=70

D is the answer

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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 18:38
100+10x^2 Bod bought 5 shirts, so total price will be 100+10*5^2=350
average price of 5 shirts is 350/5=70
so D is right
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 19:47
The price of shirts at Primark is defined as Euro (100+10x^2), where x is the number of shirts purchased. Bob purchased 5 shirts from the above shop. The average price of the shirt is:

A. 40
B. 50
C. 60
D. 70
E. 75

Total price of 5 shirts: 100+10x^2= 10(10+5^2) = 10 (35) = 350.
Average = total price/ no. of shirts = 350/5 = 70.

Ans. D
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 20:05
Average price = Total price / Number of items purchased.
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 20:35
total price
= 100+25*10
= 350
total shirts = 5
thus avg price
= 350/5 = 70
D
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 22:44
price of shirts = (100+10\(x^2\)) euro --- x= number of shirts purchased

bob purchased 5 shirts
total price of 5 shirts = (100+10*\(5^2\)) = 350 euro

average price of the shirt = \(\frac{350}{5}\) = 70

D is the answer
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 15 Feb 2020, 23:23
Solution:

Question 4: The price of shirts at Primark is defined as Euro \((100+10x^2)\), where x is the number of shirts purchased. Bob purchased 5 shirts from the above shop. The average price of the shirt is:

A. 40
B. 50
C. 60
D. 70
E. 75

In this question, we need to substitute the value of x = 5 shirts that are purchased in order to find out the price of those shirts. Then, we need to divide the total price obtained by 5 to find the average price of the shirt and hence, the answer to this question.

Therefore, putting the value of x = 5, we get:
\(100 + 10x^2 = 100 + 10*{5}^2 = 100 + 250 = 350\)
Average price of shirt = (Total price of 5 shirts) / 5 =\(\frac{350}{5}\)
Therefore, required average price = 70, which is Option D.

Option D is the right answer.
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Re: The price of shirts at Primark is defined as Euro (100+10x  [#permalink]

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New post 16 Feb 2020, 05:41
Solution:

Price of shirts: 100+ 10x^2
Now Bob purchased 5 shirts, it cost him a total of: 100+ 10*(5^2) = 350.

The average price of each shirt will be: 350/5 = 70.

Answer: 70
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Re: The price of shirts at Primark is defined as Euro (100+10x   [#permalink] 16 Feb 2020, 05:41

The price of shirts at Primark is defined as Euro (100+10x

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