Question 245511
Let s=survivor and d=death
s=.5, d=.5
s^5=.5^5=.03125 all 5 survive.
.
nCr*s^3d^2
=5C3*.5^3.5^2
=10*.125*.25
=.3125 Three survive
.
nCr*s^4d 
5*.0625*.5
=.15625 four survive.
.03125+.15625+.3125
=.5 more than 1/2 survive.
.
Ed