Solution of difficult problem | Part 4 | SEE | Class 10 | Probability, Mensuration ,Statistics |

This video is all about solution of different difficult problem related to chapter Sequence and series , Mensuration , Statistics & Mode and Probability of class 10 , C.Math.
Question :
A)
If the sum of first seven term and that of last seven term of an A.p be 126 and 441 respectively. Find the sum of first and last tems.
B)
The lower part of a wooden toy is a cone of radius 7 cm and height 24cm and the upper part is a cylinder of diameter 7cm and height 10cm as shown in the figure :
a) Is the curved surface area same as the total surface area in this solid.
b) Calculate the total surface area of the combined solid.
c) Compare the C.S.A and plain surface area of the solid.
C)
From a bag containing 3 to 20 numbered cards, a card is drawn at random.
a) If 'A' and 'B' are non-mutually exclusive events, then Write the formula to find P(AUB)
b) Mohan tells that the events of occurring the cards with the squared number and cube number is mutually exclusive event, is he correct ? Give reason.
c) find the probability of getting a square numbered card or cube numbered card.
d) Find the probability of getting an odd number or prime number.
D)
The table below shows the marks distribution obtained by the students of mathematics examination.
Marks Obtained
0-10 10-20 20-30 30-40 40-50
No. of students
3 5 6 10 9
a) In the formula for finding the mode of grouped data,
Mo = L + (f1-f0)/(2f1-f0-f2) x i, what does f₂ denote ?
b) what is the modal class?
c) find the mode.
d) find the average marks of the students who obtained the Marks lying in the classes below the modal class.

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