Question

without repetition, using digits 2,3,4,5,6,8 and 0, how many numbers can be made which lies between 500 and 1000?
a) 70
b) 147
c) 60
d) 90​

Answer 1

Answer:

90

Step-by-step explanation:

I am solving this using gap fill method.

_ _ _

First place can be filled in 3 ways ( 5 6 and 8)

Since, We use up one number to fill first place we are left with 7-1 = 6 numbers without any restrictions.

Second place in 6 ways.

Third place in 5 ways.

Therefore, 3×6×5 = 90 ways

Answer 2

a) 70

b) 147

c) 60

d) 90

Answer is:90.