Coin collector bought a set of coins for $350, then sold the set for $700, making a profit of $50 per coin.. how many coins were in the set?

7 coins were there in the set.

Step-by-step explanation:

coin bought price =350 dollar

coin sale price=700 dollar

profit=sale price - bought price

profit=700-350=350 dollar

profit per coin =50

Number of coins=?

Number of coins=

Number of coins=

Number of coins=7

Answer

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.

ab will be equal to