Abag contains a total of 100 black and white marbles. without looking in marble is chosen, recorded, and placed back in the bag. the student records a black marbles and two white marbles. predict the number of black marbles in the bag.

200

Step-by-step explanation:

Ok, from the amount of ball picked .

He picked two white and one black.

And there are 100 black balls in the air bag, so the ratio of pick is 1:2.

From the ratio of pick we can predict the amount of white balls.

I.e 2*100 = 200 balls are white

answer

a) the midrange of the data set shown is 85.5

step by step explanation

let's find the midrange.

the midrange is nothing but add the greatest value and the least value, then divide it by 2.

here the greatest value = 99

the least value = 72

midrange = (99 + 72)/2

= 171/2

midrange = 85.5

you.