Question

200 students of Commerce stream of a higher secondary school cast their votes in an election. Out of 200 students 40% were girls. The number of students of standard 11th and 12th are equal. 10% of the votes were declared invalid. The proportion of valid votes cast in standard 11th and 12th was 7:8, of which 40 girls were of standard 11th and 38 girls were of standard 12th. The numbers of invalid votes in the case of boys and girls of standard 12" were equal. Present the above data in a tabular form.​

Answer 1

Answer:

Hypotension reduces blood flow and therefore oxygen delivery to organs and tissues, which may cause cellular damage and dysfunction. When oxygen delivery is insufficient to support tissue metabolic requirements, a person is said to be in circulatory shock.

Answer 2

Step-by-step explanation:

Correct option is

B

20

Let M, P and C denote the students studying Mathematics, Physics and Chemistry

And U represents total students

So, n(U)=200,

n(M)=120,n(P)=90

n(C)=70,n(M∩P)=40,n(P∩C)=30

n(M∩C)=50,n(M∪P∪C)

′

=20

∴n(M∪P∪C)

′

=n(U)−n(M∪P∪C)

⇒20=200−n(M∪P∪C)

⇒n(M∪P∪C)=180

⇒n(M∪P∪C)=n(M)+n(P)+n(C)

−n(M∩P)−n(P∩C)−n(C∩M)+n(C∩M∩P)

∴180=120+90+70−40−30−50+n(C∩M∩P)

⇒180=280−120+n(C∩M∩P)

⇒n(P∩C∩M)=300−280=20

Hence, the number of students studying all three subjects is 20.