Question

the probability of three digit negative natural number is
​

Answer 1

Explanation:

ANSWER

Assume z to be 0,2,4,6,8,10 and find solution of x+y=10−z, we get

Case 1: z=0⇒x+y=10 and x,y∈{0,1,2,...,10}

This can be done in

10+2−1

C

2−1

=

11

C

1

ways.

Case 2: z=2⇒x+y=8 and x,y∈{0,1,2,....,8}

This can be done in

8+2−1

C

2−1

=

9

C

1

ways.

Similarly, we can obtain for all the cases as

7

C

1

,

5

C

1

,

3

C

1

and

1

C

1

ways.

The total number of solutions for the given expression is

10+3−1

C

3−1

=

12

C

2

ways.

Hence, probability =

12

C

2

11

C

1

+

9

C

1

+

7

C

1

+

5

C

1

+

3

C

1

+

1

C

1

=

66

36

=

11

6

Hence, option C is correct.

Answer 2

Answer:

here is your answer

Explanation:

hope it will help u