Martina earns one-sixth of her annual income during the month of June and one-eighth in August. Pam earns one-third of her annual income in June and one-fourth in August. Martina's earnings for June and August equal Pam's earnings for the same period. What portion of their combined annual income do the two girls earn during the ten months NOT including June and August?

(A) 1/8
(B) 7/24
(C) 7/18
(D) 11/18
(E) 7/8


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Martina earns 1/6 + 1/8 = 4/24 + 3/24 = 7/24 of her total annual income in June and August.

Pam earns ⅓ + 1/4 = 4/12 + 3/12 = 7/12 = 14/24 of her annual income in June and August.

Even though they earn the same in those months, we see that Martina’s annual income is twice Pam’s. Thus, we can let Pam’s salary = 24 and Martina’s = 48.

Thus, in the months not including June and August, Martina earns 17/24 x 48 = 34 and Pam earns 10/24 x 24 = 10.

So the fraction of their combined annual income earned in the other months is:

(34 + 10)/( 48 + 24) = 44/72 = 11/18

Answer: D
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