Question
A set contains ten numbers. The average of the first
six numbers is (x − 5), and the average of the last three numbers is (x + 1). The average of the entire set is 'x'. If the 7th number of the set is 48, then find the value of 'x'.Solution
Sum of the numbers of set = 10x Sum of first 6 numbers = 6(x − 5) = 6x − 30 Sum of last 3 numbers = 3(x + 1) = 3x + 3 ATP, 6x − 30 + 48 + 3x + 3 = 10x 9x + 21 = 10x x = 21
How is the mother of J related to the daughter of H?
G is the daughter of H. F is the only daughter of N but N is not the father of F. I is the son of P and brother of F. How is P related to F if H is the ...
Who is the grandmother of S?
How is L related to N?
All the six members L, M, N, O, P and Q of the family live together. L is the father-in-law of P. L is married to Q. M is the only daughter of Q. N is t...
If father of V is brother of mother of W’s wife’s brother. How is sister of husband of mother of V related to W’s son’s mother’s brother’s ...
How is G related to E?
Study the information carefully and answer the questions accordingly.
There are nine members in a family with four females and two married coup...
How I related to F?
In a family of six members, C is the daughter of U’s daughter only brother. E is the daughter-in-law of L, who is husband of U. Z is brother of B, the...
Relevant for Exams:
