Question: Please help me understand these questions and please Type the steps to help me understand using the typing mathematical equations options here and for graphs

Please help me understand these questions and please Type the steps to help me understand using the typing mathematical equations options here and for graphs please try and make it as readable as possible using a graphing software or drawing it very clearly. Thank you.

help me understand using the typing mathematical equations options here and for

A quiz marked out of 100 is written by 800 students. The cumulative frequency graph for the marks is given below. Mmhsr 01 candidates 1 n- 10 90 30 ('10 b0 60 (O 80 90 100 M a rk a) Estimate the number of students who scored 25 marks or less on the quiz. b) The middle 50% of the quiz results lie between marks a and b, where a

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