Question 2 (multiple choice worth 6 points)
(09.03 lc)
tanya drives to work every day and passes two independently operated traffic lights. the probability that both lights are red is 0.55. the probability that the first light is red is 0.69. what is the probability that the second light is red, given that the first light is red?
0.83
0.75
0.80
0.73

(C) 0.80

Step-by-step explanation:

Let the probability that the first light is red is= and

the probability that the second light is red= . Then,

Probability that both lights are red= = 0.55,

Probability that the first light is red= =0.69,

Probability that the second light is red, given that the first light is red==

=

=

≈

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°