सिद्ध करो कि A={3,4,5,6,7,8}, समुच्चय B={x|x विषम संख्या} का उपसमुच्चय नहीं है

If A={1,2,3,4,5,6,7,8} and B={1,3,4,6,7,8,9} then

If X={1,2,3,{4,5},6,{7,8,9,10} then {4,5} sub X

The average of twelve numbers is 42. The average of the last five numbers is 40 and that of the first four numbers is 44. The 6th number is 6 less than the fifth and 5 less than the 7th number. The average of the 5th and the 7th numbers is: बारह संख्याओं का औसत 42 है | अंतिम पांच संख्याओं का औसत 40 तथा पहली चार संख्याओं का औसत 44 है | छठी संख्या पाँचवीं से 6 कम है तथा 7वीं संख्या से 5 कम है | 5वीं और 7वीं संख्या का औसत है :

A = {x : 2 lt x lt 8 " and " x in N} and B = {x:3 lt x lt 9 " and " x in W} . Find (A - B) nn (B - A) . the following are the steps involved n solving the above problem. Arrange them in sequential order. (A) A = {3,4,5,6,7} and B = {4,5,6,7,8} (B) A - B = {3}, B - A = {8} (C) A - B = {3,4,5,6,7}-{4,5,6,7,8}, B-A ={4,5,6,7,8} - {3,4,5,6,7} (D) (A - B) nn (B - A) = phi

The average of twelve numbers is 46. The average of the first four numbers is 43 and that of the last five numbers is 49.4. The 5th and the 6th numbers are respectively 4 and 6 more than the 7th number. What is the average of the 5th and the 7th numbers? बारह संख्याओं का औसत 46 है | पहली चार संख्याओं का औसत 43 तथा अंतिम पांच संख्याओं का औसत 49.4 है | 5वीं और छठी संख्या सातवीं संख्या से क्रमशः 4 और 6 अधिक है | 5वीं और 7 वीं संख्या का औसत ज्ञात करें |