Question
In a school, the number of girls is 25% less than the
number of boys. If the number of boys increases by 20% and the number of girls decreases by 10%, find the overall percentage change in total students.Solution
ATQ, Let the initial number of boys be 100x
So, the initial number of girls = 100x × 0.75 = 75x
Total number of students = 100x + 75x = 175x Number of boys after increase = 100x × 1.20 = 120x
Number of girls after decrease = 75x × 0.90 = 67.5x New total number of students = 120x + 67.5x = 187.5x Overall change = 187.5x - 175x = 12.5x
Percentage change = (12.5x ÷ 175x) × 100 = 7.14% increase
Eight persons N, O, P, Q, R, S, T and U sit in a row facing north direction. S sits second to the left of Q, who is not extreme right end. P is second p...
Which of the following statement is true?
Six persons S, T, U, V, W and X are sitting in a row facing north. S sits third to the left of X. T sits to the immediate left of U but not adjacent to ...
In which of the following statement, the first and second persons are sitting opposite to each other in the final arrangement?
I) PW
...
Who sits 3rd to the right of T?
Which of the following statement is false regarding R?
Who among the following has his birthday on 28th March?
Six persons, L, N, P, R, T, V, sit along a linear row and face in the north direction. N sits second to the right of R. Two persons sit between N and T...
What is the position of B with respect to the one who is sitting 2ndto the right of M?
If all the letters in the word ‘UNDERGROUND’ are arranged in alphabetical order from left to right such that the vowels are arranged first followed ...
Relevant for Exams:
