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प्रश्न
Choose the correct alternative.
Corr `("x - a"/"c", "y - b"/"d")` = - corr (x, y) if,
विकल्प
c and d are opposite in sign
c and d are same in sign
a and b are opposite in sign
a and b are same in sign
उत्तर
c and d are opposite in sign
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| Y | 45 | 48 | 50 | 55 | 65 | 70 | 75 | 72 | 80 | 85 |
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