Amanufacturing firm just received a shipment of 20 assembly parts, of slightly varied sizes, from a vendor. the manager knows that there are only 15 parts in the shipment that would be suitable. he examines these parts one at a time. a. find the probability that the first part is suitable. (round your answer to 2 decimal places.) probability b. if the first part is suitable, find the probability that the second part is also suitable. (round your answer to 4 decimal places.) probability c. if the first part is suitable, find the probability that the second part is not suitable. (round your answer to 4 decimal places.) probability

a. 0.75

b. 0.5526

c.  0.1974

Step-by-step explanation:

Probability is typically expressed as a fraction where the numerator is the number of desired outcomes and the denominator is the total number of outcomes. In this case the suitable parts is the desired outcome and the total shipment is the total parts:

The probability the both the first and second part are suitable:

Since the probability of getting a suitable part the first time is 15/20, then there is one less suitable part and one less part overall to choose on the second time, or 14/19.

Lastly, the probability of choosing a suitable part the first time is again 15/20, but the second part not being suitable would be 5/19:

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.