-In a statistical investigation of 1000 families of a city, it was found that 60 families had neither a radio nor a TV. 790 families had a radio and 210 families had a TV. How many families in the sample have both?

Related MCQs

• 68-In class of 250 students, 75.8% took French and 49.4% took Latin. How many students took both French and Latin?
• -In class of 250 students, 75.8% took French and 49.4% took Latin. How many students took both French and Latin?
• -The mean of 100 items was found to be 40. If at the time of calculation two items were wrongly taken as 36 and 32 instead of 54 and 34, the correct mean is
• -The angle of elevation of the top of a tower is 30 degrees, on walking 100m meter, the elevation is found to be 60 degrees. Find the height of the tower.
• -How many solid spheres 6cm in diameter could be moulded from a solid metal cylinder whose height is 45cm and diameter 4cm?
• -How many sevens are there in the following number series which are preceded by an odd number and followed by an even number? 374579673173978375971572
• -The large hand of a clock is 71.12cm long. How many centimetres does its extremity move in 20 minutes?
• -How many 6 letters words can we make using the letters in word ‘QUALITY’ without replications?
• 56-Six friends are sitting in a circle and are facing the centre of the circle. Deepa is between Prakash and Pankaj. Priti is between Mukesh and Lalit. Prakash and Mukesh are opposite to each other. Who is just right to Pankaj?
• -Six friends are sitting in a circle and are facing the centre of the circle. Deepa is between Prakash and Pankaj. Priti is between Mukesh and Lalit. Prakash and Mukesh are opposite to each other. Who is just right to Pankaj?