Which of the following data can be represented in a histogram ? The number of students in each class of a school.

Collect the details and find the probabilites of selecting a student from tenth standard in your school.

Which of the following are sets? Justify your answer (i) The collection of all the months of a year begimng with the letter "J". (ii) The collection of ten most talented writers of India. (iii) A team of eleven best cricket batsmen of the world. (iv) The collectionofall boys in your class. (v) The collection of all even integers.

Suppose that 120 are studying in 4 sections of eleventh standard in a school. Let A denote the set of students and B denote the set of the sections. Define a relation from A to B as x related to y if the student x belongs to the section y. Is this relation a function? What can you say about the inverse relatioin. Explain your answer.

Suppose that 120 students are studying in 4 sections of eleventh standard in a school. Let A denotes the set of students and B denote the set of the sections. Define a relation from A to B as "x related to y if the student x belongs to the section y". Is this relation a function ? What can you say about the inverse relation ? Explain your answer.

There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on separate cards, the cards being identical. Then she puts cards in a box and stirs them thoroughly. She then draws one card from the box. What is the probability that the name written on the card is the name of (i) a girl? (ii) a boy?

In a private school a physics teacher was asked by her student how to understand first law of thermodynamics in an easier way by using hints or any examples. The teacher was also thinking for a long time and when she was taking classes for 12^(th) standard students about Einstein's photoelectric equation, she was striked with an idea for clearing doubt of her 11^(th) std students. Can you guess her idea? (ii) Derive and Give expression for C_(P)-C_(V)&'gamma' for Monoatomic molecule.

In a private school a physics teacher was asked by her student how to understand first law of thermodynamics in an easier way by using hints or any examples. The teacher was also thinking for a long time and when she was taking classes for 12^(th) standard students about Einstein's photoelectric equation, she was striked with an idea for clearing doubt of her 11^(th) std students. Can you guess her idea? (i) Define degrees of freedom?

A student records the following data for the magnitudes (B) of the magnetic field at axial points at different distances x from the centre of a circular coil of radius 'a' carrying a current I. Verify (for any two) that these observations are in good agreement with the expected theoretical variation of B with x.