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- anonymous

A dice is rolled 6 times. The probability that two different numbers will turn up three times each is: . (Write your answer in the form 0.xxxx, rounded up to the 4th digit.)

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- anonymous

0.006? 6C2 * (6!/3!*3!)/6^6

- anonymous

elucidate on how u got this.
what first jumpred to my mind was 6c2*6c6/6^6

- anonymous

Hi Johnny .. this would be (6c2 * 6!/(3!*3!))/6^6

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- anonymous

hey shaan, can you help me check the rest?

- anonymous

ill just post it here?

- anonymous

kk ..shoot

- anonymous

ill repost here?

- anonymous

One is looking to invest 20 thousand dollars among 4 opportunities. Each investment should be an integral in units of 1 thousand dollars. A portfolio corresponds to an investment policy. For example, (5,6,3,6) is a portfolio that invests 5 thousand dollars in the first opportunity, 6 thousand in the second, 3 thousand in the third, and 6 thousand in the fourth. (0,9,8,3) is another portfolio in which no investment is made in the first opportunity. The total number of portfolios is:

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