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Q57. A box contains 20 red marbles, 11 yellow marbles, 14 green marbles. If you draw and replace marbles 3 times, what is the probability
that the third marble is the first red marble to be drawn?
Ops. A. O 0.137
B. 00.411
C. O 0.093
D. 0.087
Answers
Answered by
2
Answer:
do do to Coक्षय छैभबथमंतंथढछडझतंयधमसछबभझयंयंरोथ
Answered by
0
Answer:
Option A) 0.01409
Given:
number of different marbles = 3
number of red marbles = 20
number of yellow marbles = 11
number of green marbles = 14
Solution:
Total number of marbles = 20 + 11 + 14 = 45
n(S) = 45
if three balls are drawn at random from 45 balls
n(E) = 45C3
= 14190
probability that the ball drawn is red = 20C1 / 45C3
= 0.01409
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