Question

There are only green counters, yellow counters and red counters in a bag.The ratio of green counters to yellow counters is 7: 11. Ismael takes a counter at random from the bag .The probability that the counter is red is 0.25. Work out the probability that Ismael takes green counter.​

Answer 1

Answer:

7/24

Step-by-step explanation:

red counters= 0.25 of all counters so yellow + green= 0.75

7x+11x= 75k

18x=75k

6x= 25k

x=25, k=6

18x= 450 ⇒ 0.75 of all

⇒ total= 450/3*4= 600

green= 7*25= 175

probability of green= 175/600= 7/24

Answer 2

Answer: the probability is 7/24

Step-by-step explanation:

red counters= 0.25 of all counters so yellow + green= 0.75

7x+11x= 75k

18x=75k

6x= 25k

x=25, k=6

18x= 450 ⇒ 0.75 of all

⇒ total= 450/3*4= 600

green= 7*25= 175

probability of green= 175/600= 7/24