P(B)= 9/20 P(A and B)= 9/100 P(A)=?
2 Answers
Explanation:
Assuming events
"P"(A nn B) = "P"(A) * "P"(B)P(A∩B)=P(A)⋅P(B)
" "9/100 = "P"(A) * 9/20 9100=P(A)⋅920
20/9 * 9/100 = "P"(A)209⋅9100=P(A)
" "20/100="P"(A) 20100=P(A)
" "1/5="P"(A) 15=P(A)
Explanation:
multiplication rule for probabilities:
-
hence,
this can be checked by applying the multiplication rule again: