Important Questions for Class 10 Maths Probability (i) white (ii) red (iii) not black (iv) red or white 7. In a family of 3 children, what is the probability of at least one boy? 8. Two dice are thrown simultaneously. Find the probability of getting: (i) an even number as the sum (ii) a total…
Important Questions for Class 10 Maths Statistics 1. If the mean of x, x+3, x+6, x+9 and x+12 is 10, then x is____ a) 1 b) 2 c) 6 d) 4 2. 2. For a frequency distribution, Mean, Median and Mode are connected by the relation__ 3.If the median of data :…
Important Questions for Class 10 Maths Surface Areas and Volumes a) 4.2 b) 2.1 c) 8.4 d) 1.05 2. .A cone and a hemisphere have equal bases and equal volumes. The ratio of their heights is____ a) 1:3 b) 1:2 c) 2:1 d) 3: 1 3. A solid is hemispherical at bottom…
Important Questions for Class 10 Maths Polynomials 3. Find the zeroes of the quadratic polynomial x2 + 7x + 12 and verify the relation between the zeroes and coefficients. 4. If 2 and ½ are zeroes of px2 + 5x + r, then find the values of p and r 5. Find the zeroes…
Explain why 7 x 11 x 13 + 13 and 7 x 6 x 5 x 4 x 3 x 2 x 1 + 5 are composite numbers Sol. 7 x 11 x 13 + 13 = 13 ( 7 x 11 + 1) which is a composite number because it has a factor 13….
Exercise 4.3 class 10 maths 1. Find the nature of the roots of the following quadratic equations. If the real roots exist ,find them. (i) 2x² – 3x + 5 =0 Here a = 2 , b = -3 , c = 5 D = b² – 4ac D = (-3)² – 4…
exercise 3.1 class 10 maths 1. Form the pair of linear equations in the following problems, and find their solutions graphically. (i) 10 students of Class X took part in a Mathematics quiz. If number of girls is 4 more than the number of boys,find the number of boys and girls who took part in…
exercise 2.2 class 10 maths 1 Find the zeroes of the following Quadratic Polynomials and verify the relationship between the zeroes and the coefficients. (i) x²-2x-8 = x²-4x+2x-8 =x(x-4)+2(x-4) =(x+2)(x-4) for finding zeores x+2=0 , x=-2 x-4=0, x= 4 so zeroes are -2,4 Verifications : Sum of zeroes = -2+ 4 = 2= -(-2)/1 =…
exercise 2.1 class 10 maths Solutions: For finding number of zeroses of polynomials from graph, we need to check that how many times the graph cuts the x-axis, that will be the number of zeroses of that polynomial (i) in this part the graph of the polynomial do not cut x-axis , so it has…
exercise 1.2 Class 10 Maths 1. Prove that √5 is irrational. Sol. Let us assume to the contrary that √5 is an irrational number. So it can be written in the form of p/q where p and q are coprime integers and q is not equal to zero. √5= p/q squaring both sides (√5)² =…
