Answer:

Step-by-step explanation:
Given
-- number of rolls
Required
The mean of 2's
The distribution follows binomial distribution where:

In this case:
---- the theoretical probability of rolling 2
So, the mean of 2's is calculated using:



Simplify
or

Answer:
90 bag
Step-by-step explanation:
no of bags will he have left=213-123
=90 bags of candy
Answer:
50272
Step-by-step explanation:
Okay how I solve these equations is I take the problem apart like this:
3142 = 3000 + 100 + 40 + 2
Now we multiply each number by 16:
3000 * 16 = 48000
100 * 16 = 1600
40 * 16 = 640
2 * 16 = 32
Then we add all the totals together:
48000 + 1600 + 640 + 32 = 50272
Hope this Helps ;)