Find the variance of the prob. Show solution each

1. The probabilities of companies to manufacture medicines for COVID-19 STEPS SOLUTION 1. Construct the probability distribution for the random variable X X P(X) representing the number of company manufacturing medicines N JIN JIN VIA 3 4 2. Multiply the value of the random variable X by the corresponding X P(X) X.P(X) probability P(X) 1 W N A 3. Get the total/summation of X.P(X) EX.P(X) 2. Students taking up Online learning STEPS SOLUTION 1. Construct the probability distribution for the random variable X X P(X) representing the number of students 15 0.24 attending the online learning/classses. 20 0.28 24 0.20 30 0.23 40 0.05 2. Multiply the value of the random variable X by the corresponding X P(X) X.P(X) probability P(X) 15 0.24 20 0.28 24 0.20 30 0.23 40 0.05 3. Get the total/summation of X.P(X) EX.P(X)=