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which of the following is a collaidal solution

Hindi m questions dalo sir please

The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?

I DONT HAVE OBC CERTIFICATE NOW FOR CAT REGISTRATION CAN I SCAN AND UPLOAD MY BC CERTIFICATE DURING REGISTRATION AND SELECT CATEGORY AS OBC-NC AT THE TIME OF VERIFICATION MY OBC CERTIFICATE WILL.BE THERE WITH ME CAN I DO THIS? OR IS THERE ANY CONSEQUENCES BY DOING THIS?

preparing for UPSC Civil Service
any tips for me?

How can i prepare my exam of CDS ?
Now i am undergraduate ansd i want to clear the exam , so tell me ..how can i prepare ..i have one year complete for the exam..

where is answer key?

Anyone preparing for RBI gr B phase 2??

A sum of amount at r% compound interest doubles in 3yr.In 6 yr it will be K times of the original principle. what is the value of k?

P and Q entered into a partnership investment money in the ratio of 7 : 11 for 6 and 9 months respectively. If you got rs 3300 as his share of profit, find the profit of P?