∠1∠1 and ∠2∠2 are a linear pair, and ∠2∠2 and ∠3∠3 are vertical angles. m∠2=(5+4y)∘m∠2=(5+4y)∘ and m∠3=(6y−25)∘m∠3=(6y−25)∘ . what is m∠1m∠1 ?

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.

if you was gonna solve for a, a is a   < -12