selaromjosue selaromjosue

29-05-2019
Mathematics

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By the end of the year, Terry had passed 60% of his science tests.If Terry failed 8 test, how many did he pass?

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romannp romannp

29-05-2019

let the total no. of test be x.

so, no. of test he passed=x-8

again,

he had passed 60% of total test,

i.e. 60% of x=x-8

or, 60/100 × x=x-8

or, 0.6× x=x-8

or, 0.4x=8

or, x=20

therefore, Terry had passed 20-8=12 tests.

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