In a school there are the following numbers of students: 127 in grade one, 120 in grade two, 110 in grade three, 100 in grade four and 93 in grade five. Find the total number of students in the school

550

Step-by-step explanation:

first we have to add the number of students of all grades like

no.of students in grade one =127students

no of students in grade two=120

no of students in grade three= 110

the number of students in grade four=100

grade five=93

now

127+120+110+100+93=550

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

529 and 531

step-by-step explanation: