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Let the present ages of Shivani and Shilpa be 7x years and 5x years, respectively. Present age of Shipra = (5x – 5) × 1.20 = 6x – 6 years So according to question: 7x + 5x + 6x – 6 = 3 × (5x + 2) 18x – 6 = 15x + 6 3x = 12, x = 4 So the present age of Shivani = 7 × 4 = 28 years
For frequency distribution presentation , which option is wrong.
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Which of the following is a sources of primary data?
Which of the following statements is INCORRECT?
For the recorded observation, the coefficient of variation is 0.2 and the variance is 16. The arithmetic mean is:
At a round table, n persons are seated on n chairs. The probability that two friends from same college are sitting next to each other, is: