Change the following distribution into 'less than' type distribution and draw its ogive.
Hence find its median and also verify it.
MARKS NUMBER OF STUDENTS
20-30 4
30-40 10
40-50 12
50-60 14
60-70 8
70-80 3
80-90 4
90-100 5

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

Kate is arranging new furniture in her rectangular sitting room. she has mapped the arrangement on a coordinate pane. a, b and c represent the sofas, v1 and v2 are decorative vases and aq the aquarium. find the distance between v1 and the aquarium. any body you