Question

In a box of 50 markers, 30 markers are either red or black and 20 are missing their caps. If 12 markers are either red or black and are missing their caps, find the probability that a randomly selected marker is red or black or is missing its cap.
a 0.38
b. 1
c 0.76
d. 0.24

Answer 1

Answer:

c 0.76

Step-by-step explanation:

Red or Black  (A)= 30

Missing cap (B)= 20

Red or black and missing cap (A&B) = 12

Total number of markers = 50

The total number of markers that are red or black or is missing its cap is:

$n= A+B-(A\cap B)=30+20-12=38$

The probability of picking of those markers randomly is:

$P=\frac{38}{50}=0.76$

The probability that a randomly selected marker is red or black or is missing its cap is 0.76.