Question
The average of 7 numbers is 28. The average of first
three of them is 23 and the last three of them is 42. Then the fourth number is:Solution
We know that, Average = Sum of all quantities/number of quantities Average of 7 numbers = 28 ∴ Sum of all numbers = 28 × 7 = 196 Average of first 3 numbers is 23. Sum of first 3 numbers = 3 × 23 = 69 Average of last 3 numbers os 42. Sum of last 3 numbers = 3 × 42 = 126 4th number = 196 – 69 – 126 = 1
All 56 students in a class are standing in a row facing north. Vivek is 25th from the right end and Suman is 12th from left end. ...
A cube is made by folding the given sheet. In the cube so formed, what would be the symbol on the opposite side of "$" symbol?
If the marks of U is better than the marks of W, then what is the rank of U in the class?
If all the alphabets of the word ‘ACTIVATE’ are replaced by immediate succeeding letter in the alphabetical series, then what is the difference betw...
Answer the questions based on the information given below.
Nine persons F, G, H, I, J, K, L, M and N are ranked according to their height. At l...
Q is older than R. N and O are of equal age. S is the youngest. P is younger than O. P is older than Q. How many persons are younger than P?
Answer the questions based on the information given below.
Nine persons R, S, T, U, V, W, X, Y and Z are ranked according to their height. At l...
R is shorter than S but taller than T. U is shorter than R but taller than T and V is shorter than S but taller than R. The shortest person is:
(1) Punishment   Â
(2) Arrest      Â
(3) Crime      Â
(4) Judgment
...How is T related to S? Â Â