Katya writes each letter in the word “PROBABILITY” on a different card and
turns over the cards. Then she mixes the
cards and draws one card at random. What
is each theoretical probability?
a) P(B)
b) P(a vowel)
c) P(B or I)
d) P(K)

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

207/8 is the right