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As we know, M1 × D1 = M2 × D2 Where, M = number of Men and D = number of Days ⇒ N × 50 = (N + 5) × 40 ⇒ 5N = 4N + 20 ⇒ N = 20 Hence, the value of N = 20
The average of five even numbers is 60. If we replace two of these even numbers, 84 and 92, with a single even number X, the new average decreases by 4....
Average of four numbers is 18. Sum of smallest and largest number is 32. If difference between other two numbers is 2, then find the square of second sm...
The average of 8 numbers is 5.95. The average of two of them is 5.4, while the average of the other two is 5.86. the average of the remaining four numbe...
The combined average number of pens with persons ‘B’ and ‘C’ is 75% of the combined average number of pens with persons ‘A’ and ‘D’. The...
The average expenditure of a man for the first five month is Rs.14000 and for the next seven months is Rs.12000. If he saves 17000 in that year then fin...
P, Q, R, S and T are five persons. The weight of P, Q and R is 80%, 102% and 84% respectively of the average weight of all five. The ratio of weight of ...
The average mark obtained by 160 candidates in a certain examination is 60. If the average marks of passed candidates are 65 and that of the failed cand...
The average of 12 numbers is 120. The average of the first 7 numbers is 75 and the average of the last 4 numbers is 53. What is the 8th number?
