Ytterbium decays 50% every 4.2 days. How much of an 80g sample would be left after 54.6 days? A=A0e^-kt

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

step-by-step explanation:

60: 45 =12: 9 =4: 3 so the answer is 4: 3