In an interview the probability of Praveen to got selected is 0 4 The probability of Geetha to got s...........

Quantitative Aptitude ( CCS) Probability

In an interview the probability of Praveen to got selected is 0.4. The probability of Geetha to got selected is 0.5. The probability of Sam to got selected is 0.6. The probability of Suresh to got selected is 0.8. What is the probability that at least 2 of them got selected on that day?

0.746

0.806

0.945

0.356

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Explanation:

Required probability=1 – no one got selected – 1 got selected
No one got selected = (1-0.4) x (1-0.5) x (1-0.6) x (1-0.8) = 0.024
1 got selected= 0.4 x ((1-0.5) x (1-0.6) x (1-0.8) ) + 0.5 x ((1-0.4) x (1-0.6) x (1-0.8)) +0.6 x ((1-0.4) x (1-0.5) x (1-0.8)) + 0.8 x ((1-0.4) x (1-0.5) x (1-0.6)) = 0.016 + 0.024 + 0.036 + 0.096 = 0.17
So, Required probability = 1 – 0.024 – 0.17= 0.806