If the average of 10% of a number, 25% of that number, 50 % of that number and 75% of that number is 24, then the number will be

50
60
70
80

The correct answer is (b) 60.

Let $x$ be the number. Then,

$$\frac{10}{100}x + \frac{25}{100}x + \frac{50}{100}x + \frac{75}{100}x

74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
= 24$$

$$\frac{150}{100}x = 24$$

$$x = \boxed{60}$$

Each option can be verified by substituting it into the equation.

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