Question

The probability that Joanne has eggs for breakfast and goes to school by car is 0.4. The probability that she goes to school by car on any day is 0.5. What is the probability that Joanne has had eggs for breakfast if she went to school by car?

Answer 1

Given:

The probability of eggs for breakfast and goes school by car is 0.4

The probability that she goes to school any day is 0.5

Find-:

Probability has an egg for breakfast and goes to school by car.

Sol:

$\begin{gathered} \text{ Probability goes school by car = 0.5} \\ \\ \text{ Probability breakfast egg = 0.4} \\ \\ \end{gathered}$

For common probability:

$\begin{gathered} \text{ Probability for both = Probability for car - probability of breakfast } \\ \\ =0.5-0.4 \\ \\ =0.1 \end{gathered}$

So, the probability that Joanne has had eggs for breakfast if she went to school by car is 0.1