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6. There are 16 cleaning sponges in a bin at Walmart. 7 are green and the...

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Basic Math

6. There are 16 cleaning sponges in a bin at Walmart. 7 aregreen and the remaining 9 are blue. Suppose I randomly select 4sponges. What is the probabilitythat:   (Round to 4 (FOUR) decimalplaces.)

           

            a.         Allfour are green?

            b.         Allfour are blue?

            c.         2or 3 are blue?

           

            d.         Noneare green?

            e.         3or fewer are green?

Answer & Explanation Solved by verified expert
3.8 Ratings (491 Votes)
Please note nCr n nrr Also some standard formulae are as below i nCr nCnr eg 5C2 5C3 ii nC1 n eg 5C1 5 iii nC0 1 eg 5C0 1 and iv nCn 1 eg 5C5 1 Probability Favourable OutcomesTotal Outcomes Total Outcomes choosing any 4 balls out of the 16 16C4 161644 16124 16 15 14 13 12 12 4 3 2 1 1820 a All 4 are green    See Answer
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