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PtichkaEL [24]
4 years ago
12

A two-digit random number is chosen. What is the probability that the sum of its digits is 5?

Mathematics
2 answers:
MrMuchimi4 years ago
8 0
10≤n<100

So the number of two digit numbers is 99-10+1=90

The only combinations that sum to 5 are 14, 23, 32, 41, 50 so

P(sum=5)=5/90

P(sum=5)=1/18
Brrunno [24]4 years ago
6 0
There are 90 two digit numbers.
The numbers that have 5 as the sum of their digits are:
14,23,32,41,50
which are 5 numbers out of the possible 90

Therefore the probabilty is 5/90 or 1/18
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