Question

QUESTION 7 A bag contains 10 marbles, 7 blue and 3 red. 4 blue marbles have a black stripe around them 2 red marbles have a black strip around them. A single marble is removed from the bag. Find the probability that the marble is red or has a stripe around it. A red B:stripe Find P(AUB). Give the answer as a decimal rounded to two places

Answer 1

B! Stripe Jeta Red P (A) = P(Red bemarble) = 3 10 PCB) = P(Black strips ) = 6 10 P(ANB) = PC Red marble with black strips) - 3 3 1.PCAUB) = PCA) + PCB) -PCAO B) =3 6. + - 2 3 옳를 =0.2333 0.23 P(AUB) =0.23 11

Probability that selected marble is red and have black stripes over it is 0.23