The masses of 50 women in female Sport Camp are given below,
64 41 17 48 58
60 43
47 21 23 37 5I 26 10
43 45 29 33 46 38 19
31 72 52 41 41
44 54
22 25 35 35 37 36 57
44 36 38 24 52 15 22
36 26 19 32 24 30
41 62
using a class interval 10-19.20-24

a Construct a frequency table
b find the class boundary
c find the mean
d find the variance
e find the standard deviation​

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?