Please say the answer for9th question which I kept
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Answer:ra+sb/r-s
Step-by-step explanation:
Answered by
0
Step-by-step explanation:
average age of r boys = a
total age of r boys = r×a = ra
avg. age of s boys = b
total age of s boys = s×b = sb
remaining boys =( r - s)
total age of remaining boys
= (ra - sb)
average age of remaining boys
= (ra - sb)/(r - s)
Answer: Option (a) is correct .
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