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04 Jul 2019, 00:05
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C
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based on 35
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Tari buys 5 books with an average price of $12. If Tari then buys another book with a price of $18, what is the average price of the six books?
A. 11
B. 12
C. 13
D. 14
E. 15
A. 11
B. 12
C. 13
D. 14
E. 15
04 Jul 2019, 00:40
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Bunuel
Tari buys 5 books with an average price of $12. If Tari then buys another book with a price of $18, what is the average price of the six books?
A. 11
B. 12
C. 13
D. 14
E. 15
A. 11
B. 12
C. 13
D. 14
E. 15
Total price of the 5 books =12 *5 = 60
Price of another book = 18
Total price = 60 + 18 = 78
Average = 78 / 6 = 13.
C is the correct answer.
31 Jul 2022, 23:48
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Theory
Tari buys 5 books with an average price of $12
Sum of price of 5 books = Average * 5 = $12 * 5 = $60
If Tari then buys another book with a price of $18, what is the average price of the 6 books
Average Price of 6 books = Sum of price of 6 books /6 = (Sum of price of 5 books + price of \(6^{th}\) book) / 6 = \(\frac{$60 + $18}{6}\) = \(\frac{$78}{6}\) = $13
So, Answer will be C.
Hope it helps!
Watch the following video to Learn the Basics of Statistics
- ➡ Average = Sum of all the Values / Total Number of Values
➡ Sum of All the values = Average * Total Number of Values
Tari buys 5 books with an average price of $12
Sum of price of 5 books = Average * 5 = $12 * 5 = $60
If Tari then buys another book with a price of $18, what is the average price of the 6 books
Average Price of 6 books = Sum of price of 6 books /6 = (Sum of price of 5 books + price of \(6^{th}\) book) / 6 = \(\frac{$60 + $18}{6}\) = \(\frac{$78}{6}\) = $13
So, Answer will be C.
Hope it helps!
Watch the following video to Learn the Basics of Statistics
