Alison has 6 yellow discs, 5 blue discs and 9 red discs which she places in a bag. When she draws one disc out, what is the
probability that the disc is NOT red?

Step-by-step explanation:

6+5+9=20 is the whole probabilities

when it says the disk is not red, it means it's blue or yellow

so 5+6=11

the probability is 11/20

answer: a.   one is a factor of every whole number since every number is divisible by itself.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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