1.

An urn contains different colored marbles. The probability of drawing two green marbles from the urn without replacement is 320 , and the probability of drawing one green marble is 25 .

What is the probability of drawing a second green marble, given that the first marble is green?

1/5

3/8

3/50

1/2

2.

Let cos(−θ)=4/5

and tanθ>0 .

What is the value of sin(−θ)

?

4/3

4/5

−3/5

−4/5

3.

Let tan(x)=2/5

.

What is the value of tan(π+x)

?

5/2

−2/5

2/5

−5/2

Guest Jun 5, 2018

edited by
Guest
Jun 5, 2018