3 years ago

Help me please, I need this

Mathematics

2 answers:

telo118 [61]3 years ago

6 0

321,300,0

Multiply 20x17x15x18x35

avanturin [10]3 years ago

6 0

20×17= 340

5×18= 90

340+90= 430

answer 430 km

i hope this helps ^^

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charle [14.2K]

Number defective=4
number of non-defective=total-defective
=20-4
=16
the questions asked for 1 defective
so we choose only 1 defective from 4 defective items
4C1

and for 1 non-defective
we choose only 1 non-defective from 16 non-defective items
16C1

we choose 2 items from 20 items
so 20C2

answer:
probability= [(4C1) * (16C1)] /(20C2)
=32/95

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anyanavicka [17]

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