There are 5 red and 5 black balls in a bag. Four balls are taken at random. Find the probability that all are black balls.
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Answer:
Which class are you
Step-by-step explanation:
I am class 7
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2
Answer:
No. of black & red balls-> 5
4 balls taken out
6 balls left. at most 1 ball can be black(in bag)
probability- 4/10 = 2/5
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