3/4 of alvin's marbles are black and 1/5 are green. what would be the ratio of black marbles to the green marbles?

In this question , it is given that

of Alvin's marbles are black and are green.

And we have to find the ratio of black marbles to the green marbles.

Multiplying both numerator and denominator by 20

So the required ratio is 15:4 .

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.