Which of the expressions are equivalent to the one below 3*(1+5)+6*9

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

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

What is the mean of the data set 125, 141, 213, 155, 281