X = 17
5 = x - 12
12 + 5 = x
17 = x
A percentage is out of 100%.
19 (questions right) / 28 (total) = 0.67857142857
Round to the tenth, 67.9.
<h2>
67.9%, not a passing score.</h2>
<span>Winning Probablity = 0.2, hence Losing Probability = 0.8
Probablity of winning atmost one time, that means win one and lose four times or lose all the times. So p(W1 or W0) = p (W1) + p(W0)
Winning once W1 is equal to L4, winning zero times is losing 5 times.
p(W1) = p(W1&L4) and this happens 5 times; p(W0) = p(L5);
p (W1) + p(W0) = p(L4) + p(L5)
p(L4) + p(L5) = (5 x 0.2 x 0.8^4) + (0.8^5) => 0.8^4 + 0.8^5
p(W1 or W0) = 0.4096 + 0.32768 = 0.7373</span>
This sequence keeps dividing by 2. So, you would divide 3 by 2 and you would get 1.5.
2 ways in solving this hope it helped
