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Q. 56

Expert-verifiedFound in: Page 866

Book edition
6th

Author(s)
Sullivan

Pages
1200 pages

ISBN
9780321795465

According to the Girl Scouts of America, 9% of all Girl Scout cookies sold are shortbread/ trefoils. If a box of Girl Scout cookies is selected at random, what is the probability that it is not shortbread/trefoils?

The probability is $0.91$

The given data is that 9% of all Girl Scout cookies sold are shortbread/ trefoils.

If E represents an event and $\overline{)E}$ represents the complement of E then $P\left(\overline{)E}\right)=1-P\left(E\right)$. It is given that $P\left(E\right)=0.09$

Substitute the values in the formula to find the required value.

$P\left(\overline{)E}\right)=1-P\left(E\right)\phantom{\rule{0ex}{0ex}}=1-0.09\phantom{\rule{0ex}{0ex}}=0.91$

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