thank you so much for your efforts tutors. it really means a lot to me if someone helps me to solve these problems with solutions.

7. In an examination taken by 400 students, the scores were as shown in the following distribution table: Marks Frequency Find : 1 - 10 8 a. The mode 11 -20 14 b. The mean 21 - 30 32 31 -40 56 41 - 50 102 51 - 60 80 61 - 70 54 71 -80 30 81 - 90 16 91 - 100 8The weights, in kg, of 80 members of a Weight (x kg) Number of members sports club were measured and recorded 40