2x(7)=17 I need help on two step equations plzz

the answer is   or

Explanation:

Try using Symbolab, I use it all the time it gives the correct answer and it gives good explanations.

A. ) The probability of all 3 parts are non defective :-
48:3
B.) The probability that the part selected from box 1 is defective :-
1:1
The probability of the parts selected from box 2 and 3 are non defective :-
49:2
C.) The probability that two parts are non-defective and one part is defective :-
48:2 / 1:1
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