Ineed to know how to find the mean for 77,82,87,85,32,78?

Parks is wearing several rubber bracelets one third of the bracelets are tie dye 1/6 are blue and 1/3 of the remainder are camouflage if park swears to camouflage bracelets how many bracelets does he have on

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.