Which of the following experiments have equally likely outcomes ? Explain.
(i) A driver attempts to start a car. The car starts or does not start.
(iii) A trail is made to answer a true - false question . The answer is right or wrong.
(iv) A bady is born. It is a boy or a girl.

Which of the following experiments have equally likely outcomes? Explain . A driver attempts to start a car. The car starts or does not start.

Which of the following experiments have equally likely outcomes? Explain . A baby is born. It is a boy or a girl.

Which of the following experiments have equally likely outcomes? Explain . A player attempts to shoot a basketball . She/he shoots or misses the shot.

Which of the following experiments have equally likely outcomes? Explain . A trial is made to answer a true- false question . The answer is right or wrong.

Which of the following statements are true and which are false? Give reasons for your answer. (i) Only one line can pass through a single point. (ii) There are infinite number of lines which pass through two distinct points. (iii) A terminated line can be produced indefinitely on both the sides. (iv) If two circles are equal, then their radii are equal. (v) In given fig., AB=PQ and PQ=XY , then AB=XY .

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of elements D is almost neutral. Answer the following questions based on the information given here in : (i) To which group or period of the periodic table do the listed elements belong ? (ii) Which one of the eight elements is likely to be a noble gas? (iii) Which one of the eight elements would have the largest atomic radius ? (iv) Which two elements amongst these are likely to be the non-metals? (v) Which one of these eight elements is likely to be a semi-metal or metalloid ?

Answer the followings true or false. (i) vecaand-veca are collinear. (ii) Two collinear vectors are always equal in magnitude. (iii) Two vectors having same magnitude are collinear. (iv) Two collinear vectors having the same magnitude are equal.

Carry out the following osmosis experi ment. Take four peeled potato to halves and scoop each one out to make potato cups one of these potato cups should be made from a boiled potato. Put each potato cup in a tray containing water . Now (a) Keep cup A empty (b) Put one teaspoon sugar in cup B ( c) Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours . The observe the four potato cups and answer the following : M (i) Explain why water gathers in the hollowed portion of B and C . (ii) Why is potato A necessary for the experiment . (iii) Explain why water does not gather in the hollowed out portions of A and D.