A bag contains '3' red balls and 4 black balls. A ball is selected at
random from the bag, what is the probability that the ball selected
1) Black 2) Red
Answers
Answered by
8
Answer:
1 black 4/7
2 red 3/7
total ball =3+4
=7
Answered by
5
Answer:
4/7 and 3/7
Step-by-step explanation:
(i) Possible ways to select a black from 4 black balls is ⁴C₁ = 4
Total ways to select 7 balls = 7
Probability = ⁴C₁/7
= 4/7
(ii) Possible ways to select a red from 3 red balls is ³C₁ = 3
Total ways to select 7 balls = 7
Probability = ³C₁/7
= 3/7
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