Question
The average weight of a group of NN children is (N+1)(N
+ 1) kg. When a child weighing 36.5 kg leaves the group, the average weight decreases by 0.5 kg. Determine the original number of children in the group.Solution
Sum of the weights of 'N' children = N X (N + 1) = (N2 + N) kg ATQ, (N2 + N - 36.5) ÷ (N - 1) = N + 1 - 0.5 Or, N2 + N - 36.5 = (N - 1) X (N + 0.5) Or, N2 + N - 36.5 = N2 + 0.5N - N - 0.5 Or, 15N = 360 So, 'N' = 24 Therefore, initial number of children in the group = 'N' = 24
- If WORD - LUCK = 34, then FAIR - HOPE = ?
If ‘scanty’ is related to ‘meagre’, then ‘valiant’ is related to ‘_____’.
Careful is to cautious as boastful is to:
Select the option in which the numbers are related in the same way as are the numbers in the given set.
(19, 165, 14)
Given set: Â [20, 82, 31]
Select the option that is related to first number in the same way third number is related to forth number.
26: ? :: 34: 1224
Number of letters skipped in between adjacent letters goes on increasing successively by one in the series. Identify the set following the above rule.
Select the option that is related to the third term in the same way as the second term is related to first term.
FINANCIAL : EIIAIAIAI :: DEMONSTRATION: ?
Select the option that is related to the third term in the same way as the second term is related to first term.
PURCHASING : RUPXSZHGNI:: REG...
If 58 # 67 = 82 and 24 # 55 = 33, then 72 # 84 = ?
Relevant for Exams:
