3 years ago

There are10 boxes in a grab bag. Seven of themcontains $20

Mathematics

1 answer:

Gelneren [198K]3 years ago

4 0

Answer:

7/15

Step-by-step explanation:

7 boxes out of 10 contain $20. Therefore 3 boxes do not have $20 bills.

The probability of picking a bag with a $20 bill

= 7/10

The probability of picking another bag with $20 bill

= (7-1)/(10-1)

= 6/9

The probability of getting two $20 bills.

= 7/10 × 6/9

= 42/90

= 7/15

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