Answer:
D= 2.23
Step-by-step explanation:
a p e x
Answer: R=6
Step-by-step explanation: Subtract 80-74= 6 so the range is 6.
Inverse operations are pairs of mathematical manipulations in which one operation undoes the action of the other
4 Americans can arrange themselves in 4! ways.similarly ,3 Frenchmen can arrange themselves in 3! ways.3 Englishmen can arrange themselves in 3! ways.now these 3 groups of same nationality people can be arranged among themselves in 3! ways.so total number of ways = 3!4!3!3!