In how many ways can 2 singers be selected from 4 who came to an audition?
a. 6
b. 2
c. 12
d. 4
in a batch of 280 water purifiers, 12 were found to be defective. what is the probability that a water purifier chosen at random will be defective? write the probability as a percent. round to the nearest tenth of a percent if necessary.
a. 4.3%
b. 5.6%
c. 95.7%
d. 71.8%

A. 6

A. 4.3%

Step-by-step explanation:

The total number of singers = 4

To choose singers = 2

The number of ways to choose 2 singers from 4=

Hence, A is the right option.

The total number of water purifiers  T= 280

The number of defective purifiers D= 12

The probability that a water purifier chosen at random will be defective (in percent)=

Hence, A is the right option.

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk