Question

The weekly pocket expenses of students are given below :

Answer 1

less than 225 rupees

Answer 2

Answer:

Step-by-step explanation:

Probability = Number of outcomes / Total possible outcomes

The total number of students :

= 10 + 5 + 4 + 21 + 3 + 7 = 50

1) The probability that the weekly expenses is 225

Total number of students spending 225 is = 3

P(weekly expense is 225) = 3/50

2) Probability that weekly expense is 50

Number of students spending 50 is = 10

P(weekly expense is 50) = 10/50 = 1/5

3) probability that pocket expense is less than 225

This equals to :

P(expenses = 50) or P(expense = 125) or P(expenses = 150) or P(expenses = 200)

P( expense = 125) = 5/50 = 1/10

P(expense = 150) = 4/50 = 2/25

P(expense = 200) = 21/50

Doing the substitution we have :

= 1/5 + 1/10 + 2/25 + 21/50 = 4/5

4) Probability that the weekly expense is more than 150

= P( expense = 200) or P(expense = 225) or P(expense = 250)

P(expense = 250) = 7/50

Doing the substitution we have:

= 7/50 + 21/50 + 3/50 = 31/50