Out of 80 student who secured first class marks in mathematics or in physics, 50 obtained first class marks in mathematics and 10 in both physics and mathematics.How many student secured first class marks in physics only ?
Answers
Answered by
5
Answer:
P(n) = P(A) + P(B) - P(A and B)
80 = 50 + x - 10
80 = 40 + x
x = 80 - 40 =40
The number of students secured first class marks in physics only is 40.
Answered by
2
Answer:
P(n) = P(A) + P(B) - P(A and B)
80 = 50 + x - 10
80 = 40 + x
x = 80 - 40 =40
The number of students secured first class marks in physics only is 40.
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