Percentage Analysis | MCQs

Explanation

A man sold two scooters for 24000 each.

Find the cost price of one scooter at gain of 20% :-

C.P = (S.P × 100)/(100 + gain)

= (24000 × 100)/(100 + 20)

= 2400000/120

= 20000

Explanation

Explanation

Given that 40% of a number is equal to two-third of another number, we need to find the ratio of the first number to the second number.

Let's assume that the first number is x and the second number is y. 40% of x is equal to 2/3 of y.

We can write this as: 0.4x = 2/3 y To find the ratio of x to y, we can divide both sides by y: 0.4x/y = 2/3

Simplifying further, we get: x/y = (2/3)/(0.4) x/y = 5/3

Therefore, the ratio of the first number to the second number is 5:3.

Explanation

Since the candidate secured 60% marks, the number of questions he attempted and got correct (12) is 60% of the total questions.

So, 12 = 0.6x

x = 12 / 0.6

x = 20

Therefore, the correct answer is 20.

Explanation

Let x be the number of correct answers

Number of wrong answers = 25 - x

Total marks = 2x - 0.5(25 - x) = 37.5

Simplifying the equation, we get:

2x - 12.5 + 0.5x = 37.5

2.5x = 50

x = 20

So, the number of correct answers is 20, and the number of wrong answers is:

25 - 20 = 5