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from a point P which is at a distance of 13 cm from centre O of a circle of radius 5 cm in the same plane a pair of tangents PQ and PR are drawn to the circle Area of quadrilateral PQOR

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Q. 14 छात्रों के प्राप्तांक का औसत 71 था किन्तु बाद में पता चला कि एक छात्र के प्राप्तांक 56 के बजाय 42 और एक अन्य छात्र के प्राप्तांक 32 के स्थान पर 74 चढ़ा दिये गए थे, सुधार कर लेने के पश्चात् सही औसत क्या होगा?
1⃣ 67
2⃣ 68
3⃣ 59
4⃣ 70

i want this in hindi medium

how much percent more than the cost price should a shopkeeper mark his good so that after allowing a discount of 25%on the market price he gains 20%?

If the difference between CI & SI for 3 yrs is 75% less than that for 4 yrs. Find the no. Of years for the same amount to get doubled at the same rate when posing SI.

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interest earned on RS 1500 at 2% and RS 1200 at 3% is 1320. what will be the time?