Question 981929
No more than one means one and less so find the probability of zero and 1 defect and add them.
{{{P(0)=C(25,0)(0.01)^0*(0.99)^(25-0)=1*1*0.778=0.778}}}
{{{P(1)=C(25,1)(0.01)^1*(0.99)^(25-1)=25*0.01*0.786=0.196}}}
{{{P=P(0)+P(1)}}}
{{{P=0.778+0.196}}}
{{{P=0.974}}}