Sean has a box of pens. The box contains 6 blue pens and 8 black pens and 3 red pens. Some more blue pens were added to the box. The probability of selecting a blue pen is now 1/2. How many blue pens were added to the box?

1.677

step-by-step explanation:

i'm not good at explaining stuff but if you need an answer i'm here for you.

(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