The mean marks obtained by 9 students of class 6 in an exam is 50 among them the marks obtained by 8 students are 60, 40, 50,30,80,40,45 and 40 what is the marks of remaining one student?

65

Step-by-step explanation:

The mean is calculated as

mean =

let x be the mark of the ninth student , then

= 50 , that is

= 50 ( multiply both sides by 9 )

385 + x = 450 ( subtract 385 from both sides )

x = 65

The ninth student has a score of 65

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

answer: its the third option.

step-by-step explanation:

i just took the test.