There are some coloured pins in a bag. The pins can be green, yellow, purple or grey.
A pin is going to be taken at random from the bag.
The table shows the probabilities of picking a purple or grey pin.
Colour Green | Yellow Purple Grey
Probability
0.35 0.25
The probability of picking a green pin is three times the probability of picking a
yellow one.
a) Complete the table. (2)
+
There are 14 purple pins in the bag.
b) Work out how many green pins are in the bag.

a) green=0.3, yellow=0.1

b) 12

Step-by-step explanation:

A

a) 0.35+0.25=0.6

1-06=0.4

0.4-0.3=0.1

b) 0.35=7/20=14

0.25=1/4=5/20=10

0.1=1/10=2/20=4

0.3=3/10=6/20=12

-2 is the right

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.