Question

A box contains some shapes, out of which 3 are triangles, 5 are squares and 2 circles. If a shape is selected randomly from the box, what is the probability of selecting a triangle or circle? Question 10 options: a) 1/2 b) 1/4 c) 7/10 d) 4/5

Answer 1

a) 1/2

Explanation:

All we have to do is simply find the probability of selecting a triangle, find the probability of selecting a circle and then add them together.

There are a total of 10 shapes in the box.

There are 3 triangles, so, the probability of picking a triangle is:

3/10

There are 2 circles, so, the probability of selecting a circle is:

2/10

Adding them together yields:

3/10 + 2/10 = 5/10 = 1/2

The probability of selecting a triangle or circle is 1/2.