1)X=0,1,2,3,4
FIND E(X)
The attempt at a solution:
E(X)= (4 X)(.4)X (,6)4-X
2) YOU CAN TOSS A FAIR COIN UP TO 7 TIMES.YOU WILL WIN 1000$ IF THERE TAILS APPEAR BEFORE A HEAD IS ENCOUNTERED. WHAT ARE YOU CHANCES OF WINING ?
The attempt at a solution:
2*2*2*2*2*2*2=128...