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3 years ago

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in a group of 120 people,90 of them are 30 years old or older. Everyone else in the group is younger than 20 years old. If a per

son is selected at random, what is the probability the person is less than 20 years old

1 answer:

Ksju [112]3 years ago

3 0

36% chance of the person being less than 20 years okd

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3 years ago

What is the answer to this please help!

Butoxors [25]

$z+(-0.72)=-2.5\\\\\text{Step 1}:\ x+(-0.72)+(-0.72)=-2.5+(-0.72)\qquad\text{ERROR}\\\\CORRECT\ IS:\ x+(-0.72)-(-0.72)=-2.5-(-0.72)\\\\\text{Step 2}:\ x=-2.5+0.72\\\\\text{Step 3}:\ x=-1.78$

Subtract, not add, -0.72 from both sides.

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3 years ago