A) 63.32
B) 62.62
C) 61.92
D) 64.72
Correct Answer: A
Solution :
Required average \[=\frac{30\times 67+55\times 63+40\times 61}{30+55+40}\] \[=\frac{2010+3465+2440}{125}\] \[=\frac{7915}{125}=63.32\]You need to login to perform this action.
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