| Score (x) | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| Freq (f) | 5 | 7 | 3 | 7 | 11 | 6 | 7 |
Find the mean of the data.
3.26
4.91
6.57
3.0
Correct answer is A
Score (x) 0 1 2 3 4 5 6 Freq (f) 5 7 3 7 11 6 7 46 fx 0 7 6 21 44 30 42 150
Mean = ∑fx∑f
= 15046
= 3.26
Given matrix M = |−2040−16563|, find MT+2M
|−421605062|
|−60130−31814189|
|52601134−7|
|−4080−2−1610126|
Correct answer is B
M = |−2040−16563|
MT = |−2050−16463|
2M = |−4080−21210126|
MT + 2M = |−60130−31814189|
In how many ways can the word MATHEMATICIAN be arranged?
6794800 ways
2664910 ways
6227020800 ways
129729600 ways
Correct answer is D
MATHEMATICIAN = 13 letters with 2M, 3A, 2T, 2I.
Hence, the word MATHEMATICIAN can be arranged in 13!2!3!2!2!
= 129729600 ways
If a fair coin is tossed 3 times, what is the probability of getting at least two heads?
23
45
25
12
Correct answer is D
The outcomes are {HHH, HHT, HTT, HTH, THH, THT, TTH, TTT}
P(at least two heads) = 48
= 12
If 6x3+2x2−5x+1 divides x2−x−1, find the remainder.
9x + 9
2x + 6
6x + 8
5x - 3
Correct answer is A
No explanation has been provided for this answer.
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