Var(y)=k(1-p)/p^2
where y is the random variable
k is the successes obtain from y
0<p<1
That would be 1/2 * the base = 21 * 1/2 = 10.5 in.
So 6 people split 143.40. 143.40/6 = 23.90. Thats how much each person paid for the dinner. Add the 7.50 they paid for the movie and you would get 31.40$ total for each person. If this is right could I possibly have brainliest? Hope this helped!! :)
