Tell whether the following is certain to happen, impossible can happen but not certain: A die when tossed shall land up with 8 on top.

Tell whether the following is certain to happen, impossible can happen but not certain: A tossed coin will land heads up.

Tell whether the following is certain to happen, impossible can happen but not certain: Tomorrow will be a cloudy day.

Tell whether the following is certain to happen, impossible can happen but not certain: you are older today than yesterday.

Tell whether the following is certain to happen, impossible can happen but not certain: The next traffic light seen will be green.

Complete the following statements : The probability of an event that is certain to happen is _________ . Such an event is called _________ .

A particle is thrown vertically upwards from the top of a tower with a certain velocity and takes 8s to reach the foot of the tower. The same when thrown with the same speed downwards, it reaches the foot of the tower in 2s. Calculate what time the particle would take to reach the foot of the tower when dropped freely. Taking g=9.8ms^(-2) calculate the height of the tower and the initial speed of the projectile.

Complete the following statements : (i) CPC Study Package 483 Mathematics CPC Study Package 483 Mathematics probability of an event E + Probability of the event 'not E' = …………… . (ii) The probability of an event that cannot happen is ………..Such an event is called . (iii) The probability of an event that is certain to happen is ............. . Such an event is called. (iv) The sum of the probabilities of all the elementary events of an experiment is ........... (v) The probability of an event is greater than or equal to ........... and less than or equal to ........

Classify the following statements into the categories less likely, equally likely, more likely. a) Rolling a die* and getting a number 5 on the top face. b) Cold waves in your village in the month of November. c) India winning the next soccer(foot ball)world cup d) Getting a tail or head when a coin is tossed. e) Winning the jackpot for your lottery ticket

A certain salt X gives the following results (i) Its aqueous solution shows alkaline to litmus paper (ii) It swells up to a hot glassy material Y on strong heating (iii) When conc. H_(2)SO_(4) is added to a solution of X white crystal of an acid Z separates out. Write equation for all the above reactions and identify X,Y and Z.