Answer:
probability = 6/7
Step-by-step explanation:
a+b+c= 30 students
there are 35 students in total.
=30/35
30/35 fully simplified = 6/7
the probability that a student earns a grade of A, B, or C is 6/7.
also, 6/7 as a decimal rounded the nearest hundreth is 0.86, FYI.
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Now,
b + 40° = 90° ( right angle )
or, b = 90° - 40°
◆ b = 50°
B) 50°
This is Right answer...
I hope it's help you...
Thanks♥♥
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All you have to do is divide 20 by 12.5