Answer in Statistics and Probability for desmond #119448
January 23rd, 2023
Probability of question correct “= frac{1}{5}”
Probability of question Incorrect “=frac {4}{5}”
Probability get at least six questions correct
“=_{10}C_{6} (frac{1}{5})^6(frac {4}{5})^4 +_{10}C_{7} (frac{1}{5})^7(frac {4}{5})^3+_{10}C_{8} (frac{1}{5})^8(frac {4}{5})^2+\_{10}C_{9} (frac{1}{5})^9(frac {4}{5})^1+_{10}C_{10} (frac{1}{5})^{10} (frac {4}{5})^0”
“= 6.3739 times 10 ^{-3}”