51). If the arithmetic mean of the two number is 10 and then geometric mean is 8, the numbers are
A). 20, 5 |
B). 16, 4 |
C). 15, 5 |
D). 12, 8 |
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52). The mode of the numbers 6, 5, 5, 4, 5, 5, 4, 4, 6 is
A). 4 |
B). 5 |
C). 6 |
D). None of these |
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53). The less reliable measure of dispersion is
A). Regression coefficient |
B). Standard deviation |
C). Correlation coefficient |
D). Range |
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54). The mean of 100 observations is 60. What will be the new value of mean if 8 1s subtracted from each observation and then divided by 4.
A). 50 |
B). 52 |
C). 13 |
D). 14 |
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55). The most stable measure of central tendency is
A). the mean |
B). the median |
C). the mode |
D). geometric mean |
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56). Two dice are thrown together. The probability of getting a total of 3 or 8 is
A). \( \Large \frac{24}{36} \)\ |
B). \( \Large \frac{8}{36} \) |
C). \( \Large \frac{11}{36} \) |
D). \( \Large \frac{7}{36} \) |
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57). The height of 5 persons are 59, 63, 68, 60, 72 inches. The value of range is
A). 10 |
B). 13 |
C). 12 |
D). 15 |
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58). A bag contains 4 white, 6 red and 5 blue balls out of which one ball is drawn at random. The probability that it is neither white nor red is
A). \( \Large \frac{5}{15} \) |
B). \( \Large \frac{4}{15} \) |
C). \( \Large \frac{6}{15} \) |
D). \( \Large \frac{3}{15} \) |
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59). The probability of throwing either 7 or 11 with two dice is
A). \( \Large \frac{1}{6} \) |
B). \( \Large \frac{2}{9} \) |
C). \( \Large \frac{1}{8} \) |
D). \( \Large \frac{23}{108} \) |
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60). If A and B are the mutually exclusive events then \( \Large P \left(A\cup B\right) \) will be
A). \( \Large P \left(A\right)+P \left(B\right) \) |
B). \( \Large P \left(A\right)+P \left(b\right)+POA\cap B \) |
C). \( \Large P \left(a\right)+P \left(B\right)-P \left(A\cup B\right) \) |
D). \( \Large P \left(A\right)+P \left(B\right)-P \left(A\cap B\right) \) |
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