Consider 105 independent observations. The probablity of event A in a particular experiment is 0.4 . Choose the appropriate formula to calculate the probability that event A occurs exactly 42 .times. Select one 1. Bernouliliformula 2. Moive-Laplace integral formula 3. Poisson formula 4. Mointe Laplace focis formula ( 4 x 5 3 sin x + x 2 1 7 ) d x.