Posted by tommy512 on .
(c) The number of cars found to have unsafe tires among the 379 cars stopped at a roadblock for inspection (assume that 15% of all cars have one or more unsafe tires).
(i) Find the mean. (Give your answer correct to one decimal place.)
56.85.
(ii) Find the standard deviation. (Give your answer correct to two decimal places.) 6.79
.
(d) The number of melon seeds that germinate when a package of 60 seeds is planted (the package states that the probability of germination is 0.89.
(i) Find the mean. (Give your answer correct to one decimal place.)
Correct: 53.40.
(ii) Find the standard deviation. (Give your answer correct to two decimal places.)
3.10

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Nora 56,
I got this one finally worked out right, but thanks anyway

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Nora 56,
Sorry clicked on wrong problem, this guy may need help on this one.

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Ms. Sue,
We know that Nora and Tommy are the same person.
Please use only one name for your posts. 
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Nora 56,
No they are not the same person, we are using the same computer....