passpadi

2019

Mathematics

JAMB

(2/3÷4/5)/(1/4+3/5-1/3)

A.

31/50

B.

20/31

C.

31/20

D.

50/31

Correct Answer: 50/31

Explanation

(2/3÷4/5)/(1/4+3/5-1/3). 2/3÷4/5=2/3×5/4 = 5/6 1/4+3/5-1/3=(15+36-20)/60 = 31/60 ∴ ∴(2/3÷4/5)/(1/4+3/5-1/3)=5/6÷31/60 = 5/6 x 60/31 = 50/31

(2/3÷4/5)/(1/4+3/5-1/3). 2/3÷4/5=2/3×5/4 = 5/6 1/4+3/5-1/3=(15+36-20)/60 = 31/60 ∴ ∴(2/3÷4/5)/(1/4+3/5-1/3)=5/6÷31/60 = 5/6 x 60/31 = 50/31
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