Question
The average of a set of 's' numbers is 24. If 40 is
added to the set, then the average of the set becomes 24.4. Find the value of '4 X (s - 14)'.Solution
Sum of all 's' numbers = 24s
ATQ:
(24s + 40) / (s + 1) = 24.4
Multiplying both sides by (s + 1):
24s + 40 = 24.4(s + 1)
Simplifying:
24s + 40 = 24.4s + 24.4
15.6 = 0.4s
s = 39
Noe,4 X (s - 14):
4 X (39 - 14) = 100
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