The probability that certain electronic component fail, when first used is 0.10. If it does not fail immediately, then the probability that it lasts for one year is 0.99. What is the probability that a new component will last for one year?

A family has three children.Assuming that the probability of having a boy is 0.5, what is the probability that at least one child is a boy?

The machine operates if all of its three components function. The probability that the first component fails during the year is 0.14, the second component fails is 0.10 and the third component fails is 0.05. What is the probability that the machine will fail during the year?

A police man fires four bullets on a dacoit. The probability that the dacoit will be killed by one bullet is 0.6. What is the probability that the dacoit is still alive?

In an entrance test that is graded on the basis of two examinations, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing at least one of them is 0.95. What is the probability of passing both?

If the probability that Mike will miss at least one of ten jobs assigned to him is 0.55, then what is the probability that he will do all ten jobs?

The probability that at least one of the events Aa n dB occurs is 0.6. If Aa n dB occur simultaneously with probability 0.2, then find P( A )+P( B )dot

The least number of times a fair coin must be tossed so that the probability of getting atleast one head is atleast 0.8 is

The probability that an event does not happen in one trial is 0.8 The probability that the event happens atmost once in three trials is

In an entrance test that is graded on the basis of two examinations, the probability of a randomly chosen student passing the first examination is 0.8 and the probability of passing the second examination is 0.7. The probability of passing atleast one of them is 0.95. What is the probability of passing both?

The probability that at least one of the events A and B occurs is 0.6 . If A and B occur simultaneously with probability 0.2 , find P(barA)+P(barB)