The probability that a lab specimen contains high levels of contamination is 0.10. A group of 3 independent samples are checked. Round your answers to four decimal places (e. g. 98.7654). (a) What is the probability that none contain high levels of contamination? (b) What is the probability that exactly one contains high levels of contamination? (c) What is the probability that at least one contains high levels of contamination? (a) .729

(a) 0.7290 or 72.90%

(b) 0.2430 or 24.30%

(c) 0.2710 or 27.10%

Step-by-step explanation:

Probability of contamination = 0.10

Sample size = 3

(a) The probability that none of the three contain high levels of contamination is:

The probability is 0.7290 or 72.90%.

(b) The probability that exactly one of the three contains high levels of contamination is:

The probability is 0.2430 or 24.30%.

(c) The probability that at least one contains high levels of contamination is:

The probability is 0.2710 or 27.10%.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500