In proof testing of circuit boards, the probability that any particular diode will fail is 0.01. Suppose a circuit board contains "180" diodes. (a) How many diodes would you expect to fail?
What is the standard deviation of the number that are expected to fail?
(b) What is the approximate) probability that at least four diodes will fail on a randomly selected board? (Use binomial approximation.)
(c) If five boards are shipped to a particular customer, how likely is it that at least four of them will work properly? (A board works properly only if all its diodes work.)

its a, i had the same answer, its from study island right

step-by-step explanation:

c = 0.429t

step-by-step explanation:

the constant rate at which carlos harvests cassava is 35 minutes per 15 cassavas 15/35 = 0.429 cassava per minute

therefore, an equation that models the number of cassava (c) that harvest carlos in a time (t) is the following:

where t is the time in minutes.

this means that when 35 minutes have elapsed 15 cassava have been harvested, at 70 minutes 30 cassava have been harvested and so on.

38 was the other number of your question.

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer