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1. |
A fair die is thrown twenty times. The probability that on the tenth throw the fourth six appears is |
A. | \[\frac{^{20}{{C}_{10}}\times {{5}^{6}}}{{{6}^{20}}}\] |
B. | \[\frac{120\times {{5}^{7}}}{{{6}^{10}}}\] |
C. | \[\frac{84\times {{5}^{6}}}{{{6}^{10}}}\] |
D. | None of these |
Answer» D. None of these | |