Question
The mean weight of 20 athletes is 70.2 kg. If weights of
two athletes are excluded, the mean of the remaining becomes 69.5 kg. Calculate the average weight of the two excluded athletes.Solution
ATQ,
Total weight of 20 athletes = 20 × 70.2 = 1404 kg
Total weight after excluding 2 athletes = 18 × 69.5 = 1251 kg
Sum of weights of the 2 athletes = 1404 - 1251 = 153 kg
Average weight of the 2 athletes = 153 ÷ 2 = 76.5 kg
31Â Â Â 32Â Â Â Â 41Â Â Â Â 66Â Â Â 115Â Â Â Â ?
49Â Â Â Â Â 121Â Â Â Â Â Â Â 169Â Â Â Â Â Â 289Â Â Â Â Â Â 361Â Â Â Â Â Â ?
...6   55   91   116   132    ?  . Â
98    219    75    244    ?    273
If 14,   32,    x,   50,    -13,   86,Â
then, find the value of (10x + 5x – 20)?
...13, 14, 18, 27, 43, ?
11   33   66   112   173    ?  . Â
112 ? 336 840 2520 8820
...13, 26, 104, ?, 13312, 425984
48Â Â Â 83Â Â Â 118Â Â Â 153Â Â Â 188Â Â Â ?
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