Question

In a random sample of 200 college students, 110 were females,125 were under the age of 21 years of age, and 45 males were 21 years of ageor older. A student is selected at random from the sample.What is the probability that a female student age 21 or older is selected?a. 15%b. 20%c.85%d.90%

Answer 1

Answer:  Option 'a' is correct.                      

Step-by-step explanation:

Since we have given that

Total number of students = 200

Number of females = 110

Number of students under the age of 21 years of age = 125

Number of males under the age of 21 years or older = 45

So,  it becomes

                              Males            Females    Total

21 years                     45                80              125

21 years or older       45                30              75

Total                          90              110               200

So, Probability that a female student age 21 or older is selected is given by

$\dfrac{30}{200}=0.15=15\%$

Hence, Option 'a' is correct.