The following frequency distribution displays the daily sales of muffins at Avalon Bakery.
Number Sold 1-7 8-14 15-21 20-28 27-35
Frequency 5 8 13 21 3
What is the probability that between 15 to 21 muffins will be sold tomorrow?

A) 0.50 B) 0.36 C) 044 D) 0.26

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.

What is the measure of sty in oo below? 130 310 230 50