The probabilities that a batch of 4 computers will contain0 1 2 3 and 4 defectiv

The probabilities that a batch of 4 computers will contain0 1 2 3 and 4 defective computers are 0.4979 0.3793 0.10840.0138 and 0.0007 respectively. Find the mean of the givenprobability distribution. Round your answer to the nearesthundredth.