Question

Three winning tickets are drawn from an urn of 100 tickets. What is the probability of winning for a person
who buys: (a) 4 tickets?

Answer 1

Answer:

Answer is.

Step-by-step explanation:

probabilityofsuccess=(

100

3

)

probabilityofnotsuccess=(

100

97

)

P(winononeticket)+P(winontwoticket)+P(winonthreeticket)

=

4

C

1

×[(

100

3

)×(

100

97

)

3

]+

4

C

2

(

100

3

)

2

(

100

97

)

3

+

4

C

3

(

100

3

)

3

(

100

97

)

=

4

C

1

(

10

8

3×97

3

)+

4

C

2

(

10

8

3

2

×97

3

)+

4

C

3

(

10

8

3

3

×97

)