A bag contains 70 pencils out of which 15 are green and 30 are blue. How many pencils of other colour are in the bag. A pencil is selected from a bag at random .What is the probability that it is blue?

a) There are 25 pencils of other colour in the bag.

b) P(Blue) = 3/7

Step-by-step explanation:

A bag contains 70 pencils out of which 15 are green and 30 are blue.

a) How many pencils of other colour are in the bag?

This is calculated as:

70 - (15 + 30)

= 70 - 45

= 25 pencils

Hence, there are 25 pencils of other colour in the bag.

b) A pencil is selected from a bag at random .What is the probability that it is blue?

P(Blue) = Number of Blue pencils/Total number of Pencils

P(Blue) = 30/70

P(Blue) = 3/7

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.