At a high school, students can choose between three art electives, four history electives, and five computer electives. each student can choose two electives.

which expression represents the probability that a student chooses an art elective and a history elective?

startfraction 7 c 2 over 12 c 2 endfraction
startfraction 7 p 2 over 12 p 2 endfraction
startfraction (3 c 1) (4 c 1) over 12 c 2 endfraction
startfraction (3 p 1) (4 p 1) over 12 p 2 endfraction

this is answer of 144 cubic meters

the answer is a if my teacher taught me correct

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.