Question
The average of a set of 's' numbers is 60. If 150 is
added to the set, then the average of the set becomes 60.5. Find the value of '4 X (s - 10)'.Solution
Sum of all 's' numbers = 60s
ATQ:
(60s + 150) / (s + 1) = 60.5
Multiplying both sides by (s + 1):
60s + 150 = 60.5(s + 1)
60s + 150 = 60.5s + 60.5
150 - 60.5 = 60.5s - 60s
89.5 = 0.5s
s = 179
4 X (s - 10):
4 X (179 - 10) = 4 X 169 = 676
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1528, 1416, 1204, ?, 480, -32
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
96 89 ? 90 94 91
...What value should come in the place of (?) in the following number series?
19, 235, 260, 324, 333, ?
What will come in place of the question mark (?) in the following series?
305...
In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
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7 29 61 ? 211 349
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