Question

A bag contains 10 white counters, 6 black counters, and 4 green counters. What is the probability of drawing(a) a white counter or a green counter? (b) a black counter or a green counter? (c) not a green counter?

Answer 1

Given:

Number of white counters = 10

Number of black counters = 6

Number of green counters = 4

Required: Probability

Explanation:

Total number of counters

`\begin{gathered} =10+6+4 \\ =20 \end{gathered}`

(a) Number of counters which are white or green

`\begin{gathered} =10+4 \\ =14 \end{gathered}`

Probability of drawing a white counter or a green counter

`\begin{gathered} =(14)/(20) \\ =(7)/(10) \end{gathered}`

(b) Number of counters which are black or green

`\begin{gathered} =6+4 \\ =10 \end{gathered}`

Probability of drawing a black counter or a green co