For school photos, 1/5 of the students choose to have a blue background. 2/5 of the students chose to have purple and 1/5 chose to have a gray background. what portions of the students choose to have another background

Me answer number 3plz explain how you do it

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?