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3 years ago

11

A factory produces 80 % round and 20 % square buttons. Suppose that 10 % of theround buttons and 50 % of the square buttons are

red. What is the probability that arandomly selected red button is square?

1 answer:

Katarina [22]3 years ago

4 0

Answer:

5/9

Step-by-step explanation:

Let the total number of buttons is x.

Round buttons = 80% of x = 0.8x
Square buttons = 0.2x

<u>Number of red buttons:</u>

0.1*0.8x + 0.5*0.2x =
0.08x + 0.1x =
0.18x

Number of red square buttons is 0.1x

<u>Required probability:</u>

P = 0.1x/0.18x = 10/18 = 5/9

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