Question
The average of the first three numbers is twice the average
of the next six numbers. If the average of all nine numbers is 20, then find the sum of the last six numbers.Solution
ATQ,
Let the sum of the last six numbers be 'n'.
So, (sum of the first three numbers) ÷ 3 = 2 × (n/6)
Or, sum of the first three numbers = 2n
So, (n + 2n) ÷ 9 = 20
Or, 3n = 180
Or, n = 60
If P is related to Kanpur, S is related to Jaipur in the given arrangement, Following the same pattern how is U related to ?
Who among the following person likes Red?
Six people, D, E, F, G, H and I, sit in a linear row, such that all face in the north direction. Only two persons sit to the right of E. F sits second t...
A-W, B-X, C-Y and D-Z are four married couples. In a restaurant they are sitting around a rectangular table, with three persons along each of the longer...
Which of the following is R’s position?
Four of the five are related to each other in a certain way and thus form a group, find the odd one out which doesn’t belong to the group?
...Refer to the following letter sequence and answer the question given below:
 Left) P, T, S, A, Q, R, G, P, Q, N, D, F, L, H, R, F, A, N  (Ri...
What is difference between weight of I and L?
Who among the following person sits second to the left of the one whofacing O?
Which of the following is true for F?