गर्भ निरोधक तकनीक Contraceptive Methods || जनन स्वास्थ्य 12th Biology Ch 4 Lec 3 By Yogesh Sir

The ratio of the 7th to the 3rd terms of an A.P. is 12:5, find the ratio of the 13th to 4th term :

In a row of 21 girls, when Monika was shifted by four places towards the right, she became 12th from the left end. What was her earlier position from the right end of the row? 1) 9th 2) 10tth 3) 11th 4) 12th 5) 14th

Meeta correctly remembers that her father's birthday is after 8th July but before 12th July. Her brother correctly remembers that their father's birthday is after 10th July but before 15th July. On which day of July was definitely their father's birthday ? 1) 10th 2) 11th 3) 10th or 11th 4) Can't be determined 5) None of these

An examination was held during the 2 weeks of April 3rd-Sunday to 16th Saturday. There was 1 paper for the six subjects - Physics, Chemistry, Biology, Maths, English and Hindi. Only 1 paper per day No exam on Saturdays and Sundays and Holiday on April 5th. Only 3 exams were there in a week. Chemistry was before Biology and Maths was on the next day of Hindi. The day on which the paper of biology and maths were held was the same, while that for chemistry and physics was also the same. There was no exam for 3 days between Physics and the exam prior to it. Hindi exam on Tuesday and one exam between Hindi and English exam. There was at least a gap of one day between any 2 science paper. Which of the following exam was held on April 12th ?

In a biprims experiment, the distance between the 3rd and 12th bright bands when light of wavelength 6000Å is used is the same as the distance between 4th and 14 th bright bands of light of wavelength lamda . The value of lamda is

A, B and C started a business and invested in the ratio of 3:4:5. After 4 months, A withdrew 1/12th amount of what B and C invested. If the annual income was 9200, then what was the share of B?