If there are 60 books in the college library. in how many ways will these books be arranged on the shelves if 3 of the books are taken at a time with order of arrangement of the books considered

205,320

Step-by-step explanation:

If order matters this is a permutation problem (as opposed to a combination problem).  The permutation of this situation is

₆₀P₃ = and is solved:

The 57 factorials cancel out, leaving us with 60*59*58 which comes to 205,320 different ways to pick 3 books if order matters.

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.

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation: