7. Here are some measurements for triangle ABC and triangle XYZ: o Angle CAB and angle ZXY are both 30 degrees
O AC and XZ both measure 3 units
o CB and ZY both measure 2 units
Andre thinks thinks these triangles must be congruent. Clare says she knows they
might not be congruent. Construct 2 triangles with the given measurements that
aren't congruent. Explain why triangles with 3 congruent parts aren't necessarily
congruent.

Carol has only 20p and 10p coins in her purse.

She has three times as many 20p coins as 10p coins. If Carol has £4.20 altogether, how many 20p coins does she have?

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.