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Krystallyah
21.08.2019 •
Mathematics
21% student passed in exam.if 3257 students are passing, how many student are appear in exam.
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Ответ:
Let us assume that the number of students appearing in the examination = X
Then,
The number of students passing the examination = 21X/100
So we get the equation
21X/100 = 3257
21X = 3257 * 100
21X = 325700
X = 325700/21
= 15509.52
So the number of students appearing in the examination is 15510 approx.
Ответ:
-y + x - x = y - y + x + 5
-y = x + 5
y = x - 5