" 40"20" ont "280,7" fint "8" ,a elese "

Obtain the mean , median and mode of the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Students"," "5," "7," "15," "25," "20," "15," "8," "5):}

If 10 men or 20 boys can make 260 mats in 20 days, then how many mats will be made by 8 men and 4 boys in 20 days? 240 b. \ 280 c. 260 d. 520

Find out median marks from the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "8," "30," "40," "12," "10):}

If 9&4 = 50, 3&7 = -40 and 7&5 = 20, then find the value of 4&5 = ?

The median of the following frequency distribution is {:("Class interval",f),(" "0-10,5),(" "10-20,8),(" "20-30,7),(" "30-40,10),(" "40-50,20):}

Sahil sold an item for ₹ 280 at a loss of 20%. The cost price of the item was:

Find the missing frequency of the group 20-30 when the median is 24. {:("Size",0-10,10-20,20-30,30-40,40-50),("Frequency"," "5," "25," "-," "18," " 7):}

Find the missing frequency of the group 20-30 when the median is 28. {:("Class Interval",0-10,10-20,20-30,30-40,40-50),("Frequency"," "5," "8," "?," "16," "6):}

The LCM of two numbers is 280 and the ratio of the numbers is 7:8. Find the numbers