Question

solve this and explain in detail

Answer 1

Since :
\[A=\{4,5,6\}\]
then :
\[P(A)=P(4)+P(5)+P(6)=\frac1{20}+\frac{1}{20}+\frac{3}{20}=\frac5{20}=\frac14\]
And since :
\[B=\{6,7\}\]
then :
\[P(B)=P(6)+P(7)=\frac3{20}+\frac3{20}=\frac{6}{20}=\frac{3}{10}\]

Answer 2

thanks again :)