15-05-2019
Mathematics

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Anyone willing to help me?

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choixongdong choixongdong

15-05-2019

Answer:

1/2

Step-by-step explanation:

Probably of selecting a boy:

20/30 = 2/3

and brought 10 up to 20:

45/60 = 3/4

so Probably of selecting a boy and brought 10 up to 20:

2/3 x 3/4 = 2/4 = 1/2

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