dhoran 7 hindi varshik paper solution 2022,std 7 Hindi varshik pariksha paper 22,ધોરણ 7 હિન્દી પેપર

A boy appears for 5 papers , each of the same number of maximum marks .He scores in each of the papers in the ratio of 6 : 7:8:9:10 .If his average score in all the five papers together was 60% , then in how many papers did he get more than 50% marks ?

(a) How is pH paper used to find the pH of a solutions? (b) The pH value of water is 7. What will be the pH value of (i) aqueous solution of sodium hydroxide and (ii) dil HCl.

(a) How is pH paper used to find the pH of a solution? (b) The pH value of water is 7. What will be the pH value of (i) aqueous solution of sodium hydroxide and (ii) dil. HCl.

Find the area of a coloured paper used to stick to a sphere of radius 7 cm.

The results of an examination in two papers A and B for 20 candidates were recorded as follows.8passed in paper A,7 passed in paper B,8 failed in both the papers A and B. If one is selected at random,the probability that the candidate has failed in A or B is

In how many ways can 7 exmination paopers be arranged so that the best and the worst papers are never together?

Q.22 write three solutions for the equation 7x-8y=13