Question 883244
Find the probability that none will agree.
{{{P=0.7*0.7*0.7*0.7*0.7}}}
{{{P[0]=0.16807}}}
Find the probability that exactly one person will agree.
{{{P=0.3*0.7*0.7*0.7*0.7}}}
{{{P[1]=0.07203}}}
There are 5 possible outcomes where this can occur. I-important, N-not important
NIIII, INIII, IINII,IIINI,IIIIN
So,
{{{P[1]=5*0.07203=0.36015}}}
The probability that 2 or more will agree is the difference between 1 and the sum of these two calculated probabilities.
{{{P=1-0.16807-0.36015}}}
{{{P=0.47178}}}