Question

Q1. In a factory of 455 workers, 91 are unmarried. What is the probability of selecting a worker who is married? Q2. Sides of a triangle are in the ratio 13:16:21 and its perimeter is 500 cm. Calculate the area of the triangle. Q3. The radius of a roller is 80 cm and its length is 125 cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m 2.

Answer 1

Step-by-step explanation:

Given,

Total workers (i.e. Sample space) = S = 364

Total married workers = P(married) = 91

Now, total workers who are not married = (E) = 364 – 91 = 273

Method 1: So, P(not married) = E/S = 273/364 = 0.75

Method 2: P(married) + P(not married) = 1

Here, P(not married) = 91/364 = 0.25

So, 0.25 + P(not married) = 1 – 0.25 = 0.75

Hope this answer helps .