Select random item using weight

Question

hello,

 

I want to select random items from a list with weight

 

like this

 item - weight

apple   -34

orange-37

strawberry-11

mango-8

banana -3.98

cherry-5.7

grape- 0.3

guava- 0.02

 

please help me with this if i use random generate method this grape and guava which has less than 1 is got as 1 used frequently which i should not want.

 

thanks