if a geometric sequence whose first term a=2 and its common ratio r=1 ,then the sum of the first 10 terms of it=​

Solve 2x+y=3 x+y=5 in substitution method

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll