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The main purpose of this channel is to: 1. Print various Maths questions. 2. Publishing various books. 3. Print various short notes. Share it with your friends! Hirriyyoota keessaniif share godha!
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5 103
Let R = {(x, y): x, y an element of {1, 2, 3, 4, 5} and y = 2x - 1} then what is the range of R?
5 103
If the domain of the relation R = {(x, y): y= x + 3} is A = {1, 2, 3, 4} then what is the range of R?
5 103
For the relation {(1, 2), (2, 3), (3, 4), (4, 5), (5, 6)}, then what is the domain of the given relation?
5 103
Math's Grade 12 Unit 3
#5 Mcq with answer
1. Which statement about random sampling is FALSE?
A) It minimizes investigator bias.
B) It ensures proportional representation of subgroups.
C) It requires careful planning.
D) It applies to any population type.
2. If a new value equal to the mean is added to a dataset, which statement is true?
A) Mean increases, standard deviation decreases.
B) Mean stays the same, standard deviation decreases.
C) Mean stays the same, standard deviation increases.
D) Mean and standard deviation remain unchanged.
3. In a distribution where Mean = 12, Median = 14, Mode = 16, the skewness is:
A) Positively skewed
B) Symmetrical
C) Negatively skewed
D) Not determinable
4. If all values in a dataset are multiplied by 3, the variance becomes:
A) 3 times the original
B) 9 times the original
C) Unchanged
D) √3 times the original
5. Which sampling method divides the population into homogeneous subgroups?
A) Simple random sampling
B) Cluster sampling
C) Stratified sampling
D) Systematic sampling
Answer
1. B
2. B
3. C
4. B
5. C
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5 103
Which technique is most commonly used to obtain isolated bacterial colonies?
5 103
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5 103
Let f(x) = ax + b, and f(1) = 5 and f(2) = 12, then what are the values of a and b respectively ?
5 103
Which of the following is NOT true about the function f(x) = 3x + 6 ?
5 103
If f = {(1, 2), (-3, 2), (2, 5) and g = {(2, 4), (1, 5), (3, 2). Then, what is f+g ?
5 103
Happy Gregorian New Year 2026! 🥂✨
May this Gregorian New Year bring you peace, health, and success.
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