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21 Feb 2019, 00:36
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
72% (02:34) correct
28%
(03:01)
wrong
based on 299
sessions
History
Date
Time
Result
Not Attempted Yet
Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.
A. 1044
B. 2088
C. 3022
D. 4444
E. 4488
A. 1044
B. 2088
C. 3022
D. 4444
E. 4488
21 Feb 2019, 01:41
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Bunuel
Total cost of 5 app and 4 mangoes = 36 * 9 = 324.
Total cost of 7 app and 8 mangoes = 15 * 48 = 720.
5 app + 4 mangoes = 324
7 app + 8 mangoes = 720.
....................................................
12 app + 12 mangoes = 1044..............................adding both equation .
2(12 app + 12 mangoes) = 1044 * 2....................Multiplying by 2.
24 app + 24 mangoes = 2088.
B is the correct answer.
21 Feb 2019, 02:37
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one apple cost = x
one mango cost = y
from 1st.
5x+4y = 36*9
7x+8y = 48*15
by solving these we get the cost of each apple and mangos and we can calculate the teh required average .
Posted from my mobile device
one mango cost = y
from 1st.
5x+4y = 36*9
7x+8y = 48*15
by solving these we get the cost of each apple and mangos and we can calculate the teh required average .
Posted from my mobile device
