It might be B I might not be right
Basically, it asks you to find the piece of data that is 1/10th of the overall shoe sales on a given day. As the number of shoes sold per day is 400, the piece of data you are looking for is 40. Meaning the answer is 'High heels sold on Friday'
No, for example, if you had the prime number 23, and you switched the numbers around, it is 32. 32 is not a prime number.
5/8 - 3/10
Find the common denominator:
Multiples of 8: 8, 16, 24, 32, 40 (8 x 5 = 40)
Multiples of 10: 10, 20, 30, 40 (10 x 4 = 40)
5/8 = 5*5 / 8*5 = 25/40
3/10 = 3*4 / 10 *4 = 12/40
Now you have 25/40 - 12/40
25 -12 = 13
Answer = 13/40
The answer is A.