About 11% of the population is math phobic. If two people are randomly selected, what is the probability that both are math phobic? What is the probability that at least one is math phobic?

Question

blues · Answer

P = (0.11)^2 = 0.0121

anonymous · Answer

first  one is 
$$.11^2$$ whatever that is

anonymous · Answer

at least one means not none.  none is 
$$.89^2$$so answer is 
$$1-.89^2$$

anonymous · Answer

First mathfobic AND(multiplication) second mathfobic
$$P(A)=\frac{11}{100}\cdot\frac{11}{100}$$
To get at leats one mathfobic you can calculate probability of 0 mathfobics and take inverse
$$P({B})=1-P(B)=1-\frac{89}{100}\cdot\frac{89}{100}$$

anonymous · Answer

Thanks! Big help everyone :)

anonymous · Answer

Sorry I meant 
$$P(B)=1-P(\bar{B})=...$$