A box contains 4 chocobars and 4 ice creams. Tom eats 3 of them, by randomly choosing. What is the probability of choosing 2 chocobars and 1 icecream?
A factory produces two types of lamps A and B . Following data is given:
No of lamps A
No of lamps B
500 -700
5
4
700- 900
11
30
900- 1100
26
12
1100-1300
10
9
1300-1500
8
6
Compare the variability of the life of two varieties.
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Answer:
the probability is according the total number of chances there is and total number of items
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