Question

A faraway planet is populated by creatures called Jolos. All Jolos are either green or purple and either one-headed or two-headed, Balan, who lives on this planet, does a survey and finds that her colony of 140 contains 30 green, one-headed Jolos; 45 purple, two-headed Jolos, and 75 one-headed Jolos.How many green Jolos are there in Balans Colony?A. 20B. 50C. 65D. 45

Answer 1

First, we find the total of two-headed Jolos by subtracting the total 140 and the total of one-headed 75.

`140-75=65`

There are 65 two-headed Jolos in total.

Then, we find the number of two-headed green Jolos by subtracting the total of two-headed 65 and the number of two-headed purple Jolos.

`65-45=20`

There are 20 two-headed green Jolos.

At last, we sum the one-headed and two-headed green Jolos to find their total

`30+20=50`

There are 50 green Jolos in total.

The right answer is B.