Answer :
In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
bag:
oranges and pears
# oranges = 3
p (oranges) = 0.2
Step 02:
probability:
p (event) = favorable outcomes / total outcomes
Event = orages:
# pears = p
favorable outcomes =e3
total outcomes = (# oranges + #pears) = (3 + p)
[tex]\begin{gathered} 0.2\text{ = }\frac{3}{(3+p)} \\ \\ 0.2\text{ * \lparen3+p\rparen = 3 } \\ \\ 0.6\text{ + 0.2p = 3 } \end{gathered}[/tex][tex]\begin{gathered} 0.2p\text{ = 3 - 0.6} \\ \\ p\text{ = }\frac{2.4}{0.2}=12 \end{gathered}[/tex]The answer is:
There are 12 pears i the bag