30,907 views
5 votes
5 votes
A) How many 2-digit numbers have the digit 7 exactly once?

User Ckittel
by
2.8k points

2 Answers

21 votes
21 votes

Answer:

17, 27, 37, 47, 57, 67, 87, 97.
8

Explanation:

all are 2 digit numbers with exactly one 7 in each.

User Kadiro
by
3.0k points
8 votes
8 votes

Answer:

8

Explanation:

the two digit numbers that has 7 exactly

once are 17, 27, 37, 47, 57, 67, , 87, 97

from above, there are 8 two digits

User EdXX
by
2.5k points