10. There are 3 red and 5 black balls. The number of selections of 1 red and 1 black ball is ?
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Answer:
No. of red balls = 3
No. of black balls = 5
Total no. of balls = 3+5 =8
P(getting 1 red ball) = Total no. of balls
No. of red balls
= 8
3
P(getting 1 black ball) = Total no. of balls
No. of black balls
= 8
5
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