Out of 15,000 voters ina constituency, 60% voted. Find the percentage of voters who did not vote. Can you now find how many actually did not vote?

In an election, two persons A and B contested. x% of the total voter voted for A and (x+20)% for B. If 20% of the voters did not vote, then x =

A football team won 10 matches out of the total number of matches they played.If their win percentage was 40,then how many matches did they play in all?

Analyse the observation table which shows variation of image distance [v] with object distance [u] in the case of a convex lens. Answer the questions that follow without doing any calculations. {:("Sl.No","Object distance","Image distance"),(,"u [cm]","v [cm]"),(1,-90,+18),(2,-60,+20),(3,-30,+30),(4,-20,+60),(5,-18,+90),(6,-10,+100):} (a) What is the focal length of the convex lens ? Given reasons to support your answer. (b) Write the Sl.No of the observation which is not correct. How did you arrive at this conciusion ? (c ) Use an appropriate scale to draw the ray diagram for the observation at Sl. No 4 and find the approximate value of magnification.