On a given day, the proportion of workers from Company B who purchase a coffee from the company cafeteria is 0.62 and the proportion of workers from Company C who purchase a coffee from the company cafeteria is 0.71. A random sample of 40 workers was selected from Company B and another random sample of 40 workers was selected from Company C. The proportion of workers from Company B who purchased coffee was

The proportion of workers from Company who purchased coffee was:

= 0.31

Step-by-step explanation:

Proportion of workers from Company B who purchase a coffee = 0.62

Proportion of workers from Company C who purchase a coffee = 0.71

Random sample of workers selected from Company B = 40

Random sample of workers selected from Company C = 40

Number of workers from Company B who purchased coffee  = 25 (0.62 * 40)

Number of workers from Company C who purchased coffee = 28 (0.71 * 40)

The proportion of workers from Company B who purchased coffee overall = 25/80 = 0.3125

The proportion of workers from Company C who purchased coffee overall = 28/80 = 0.35

b. x- 48 =120

step-by-step explanation:

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47