(1) [12 4/7 + 2 3/14] - 2 6/14

(2) [5 1/2 + 2 3/4] - 3 1/2

(3) 10 5/16 -[5 1/4 + 2 9/16]

(4) 6/9 + 5/18 + 1 3/6

,!

Can someone pls ! pls answer all. no explanation needed..

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

9/10 divide by -3/15 as a mixed number