Question

help

Answer 1

Some computers have CD drives and some have DVD drives. If a store carrys 4 NEW CD drive computers, and 3 NEW DVD drive computers. The same store also carrys 2 USED CD drive computers and 1 USED DVD Drive computer. What is the probability that the computer is new AND has a CD Drive?

Answer 2

count the total number of computers. How many do you have ?

Answer 3

10 computers

Answer 4

how many are new and have a cd drive ?

Answer 5

4

Answer 6

the probability is part / whole
where part is the # that meet the criteria
and whole is the total number.

Answer 7

ok so what do i do next

Answer 8

you make a fraction

Answer 9

ok

Answer 10

with what?

Answer 11

the bottom of the fraction is the total of whatever we are counting (computers in this case)
the top of the fraction is the number of computers that "pass the test" (are new and have a cd)

Answer 12

4/10= 2/5

Answer 13

yes

Answer 14

yay!

Answer 15

thanks!