Fifteen chips numbered from 1 to 15 are placed in a sack. If a chip is drawn at random, what is the probability of drawing the chip numbered 11?
a) 1/5
b) 1/11
c)1/15
d) 11/15

c

Step-by-step explanation:

out of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15, 11 only takes up one of those spots, and there being 15 numbers means that the only answer could be 1/15

answer: hi

step-by-step explanation:

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.