The blood groups of 200 people is distributed as follows: 50 have type a blood, 65 have b blood type, 70 have o blood type and 15 have type ab blood. if a person from this group is selected at random, what is the probability that this person has o blood type?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?