To read the given stem and leaf plot use the stem as the first digit of a number and the leaf as the second digit:
To find number 37: In the stem 3 look how many leaf 7 there are:
As you can see in the stem 3 there is just one leaf 7, then the value 37 apperars 1 time
__________________
In stem 1 there are two leaf 3, then, the value 13 appears 2 times
______________________