Billy takes two tests in his probability class. The probability that Billy would pass at least one test is 0.9. The probability that he passes both tests is 0.7. The tests are of equal difficulty (that is, the probability that Billy passes test 1 is the same as the probability that he passes test 2.) What is the conditional probability of Billy passing test 2 given the event that he passes test 1

⅞ or 0.875

Step-by-step explanation:

0.9 = p(1) + p(2) - 0.7

1.6 = 2p(1)

P(1) = 0.8

P(2/1) = P(both)/P(1) = 0.7/0.8

= 7/8 or 0.875

i would pic false cause it goes down towards negative

step-by-step explanation:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi