Question

18
How many numbers can be formed from 1,2,3,4,5 (without repetition), when the digit
that in the units place must be greater than in the tens place

OA
60
ОВ
2 x 4!
OC
54
OD
51/3
his​

Answer 1

Answer:

Answer :

if tens place is 1 = so unit place (2/3/4/5)

✿ 3! × 4 = 24

if tens place 2 = So unit place (3/4/5)

✿ 3! × 3 = 18

if tens place 3 = so unit place (4/5)

✿ 3! × 2 = 12

if tena place 4 = so unit place (5)

✿ 3! × 1 = 6

if tens place 5 = so unit place __

✿ not possible event

total number of ways = 24+18+12+6 = 60

Answer = A. 60