A lot contain 15 castings from a local supplier and 25 castingsfrom a supplier next state. two castings are selected randomlywithout replacment , from the lot of 40. Let A be the event thatthe first casting selected is from the local supplier, and LetB be the event that the second casting selected is from the localsupplier, determine:

a) P(A)
b)P(B/A)
c)P(A ^ B)
d) p (A U B)

-18

step-by-step explanation:

because mean value defines that total sum value over total number of set

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet