1) Find the arithmetic mean of first five natural numbers? 2) What is the probability of getting 6 when a die is thrown? 3) If you take away 2 from 3 times a number, you get 22. Find the number. 4) The marks of 5 students in an exam is given as 16.9.22,18,25. Find the median 5) Convert the equation 2x + 7 = 12 into a statement. Each question carries 2 marks 6) Solve 4(x + 3) -2=26 7) Find out the mean, median and mode for the given data: 4.5.3.5.9.10.7.2.0. Each question carries 3 marks 8) Reenu's father's age is 8 more than three times Reenu's age. If Reenu's father's age is 44. Find Reenu's age.
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1. Find the arithmetic mean of first 5 natural numbers.
⟹ • First 5 natural numbers - 1, 2, 3, 4, 5
• To find,
Applying the formula,
2. What is the probability of getting 6 when a dice is thrown?
⟹ {1, 2, 3, 4, 5, 6}
▪︎Total no. = 6
▪︎Favourable = 1
Probability of getting 6 = 1/6 Ar
4. The marks of 5 students in an exam is given as 16.9.22,18,25. Find the median.
⟹ Marks of 5 students = 16, 9, 22, 18, 25
Here, we have to arrange these Marks in Ascending order - 9, 16, 18, 22, 25
median = 3
7. Find out the mean, median and mode for the given data: 4, 5, 3, 5, 9, 10, 7, 2, 0
⟹ sum of no. = 4+5+3+5+9+10+7+2+0 = 45
total numbers = 9
Mode : the number which appeared the most.
= 5
Note : It is not copied from anywhere