Tips to study difficult subjects

Which one of the following sentences is a statement? A) 275 is a perfect square. B)Mathematics is a difficult subject C)Answer this question D)Today is a rainy day

(a)Which one of the following sentences is a STATEMENT?(ii)Mathematics is a difficult subject.

The diagram represents the number of students studying different subjects. What is the number of students who study History and Biology?

Assertion: lt is very difficult to subject vinyl chloride to nucleophilic substitution as compared to ethyl chloride Reason :The vinyl group is electron donating in viny chloride

In a survey of xavirs's school of Bhubaneswar of 200 students, It was found that 120 study math, 90 study physics, 70 study shemistry, 40 study math and physics, 30 study physics and chemistry, 50 study chemistry and math and 20 study none of these subjects then the number of students study all the subjects is :

In a survey of xavirs's school of Bhubaneswar of 200 students, It was found that 120 study math, 90 study physics, 70 study shemistry, 40 study math and physics, 30 study physics and chemistry, 50 study chemistry and math and 20 study none of these subjects then the number of students study all the subjects is :

In the given figure, how many people study only 2 subjects?