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CBSE Class 11-science Answered

Q. Ex. 8.3 - 25(ii) P.No. 441 : How mant different five letter words starting with  a vowel can be formed from the letters of the word EQUATION ?

ans. 4200

Q. Ex. 8.3 - 28(Iii) P.No. 441 : How many numbers greater than 20000 can be formed by using the digits 0,1,2,3,4 with no digit being repeated ?

ans. 72

 

 

Q. Ex. 8.3 - 29,  P.No. 441 : A moped licence plate has two letters and then four number in it . How many plates can be made without duplicating . There are no plates with number zero ? ans. 6759324

Q. Ex. 8.3 - 30, P.No. 441 : In an examination m there are three multiple choise questions and each question has four choices. Find the number of ways in which a student can fail to get all correct answers? ans. 43

Q. Ex. 8.3 - 31, P.No. 441 : There are three prizes to be distributed among six boys. In how many ways can it be done when (i) no boy gets more than one prize. (ii)there is no restriction as to the number of prizes any boy gets , (iii)no boy gets all the prizes ? ans. 120/216/210

Q. Ex. 8.3 - 32, P.No. 441 : There are 3 candidates and 5 voters. In how many ways can the votes be given ? If three candidates are among 5 voters and they vote for themselves only, then how many ways of giving votes are possible ? Why should everyone vote ? ans. 243/9 

Asked by sudhanshubhushanroy | 08 Sep, 2017, 12:00: PM
answered-by-expert Expert Answer
begin mathsize 16px style In space the space word space EQUATION space vowels space are space straight A comma straight E comma straight I comma straight O comma straight U
We space have space to space form space straight a space word space with space letter space 5.
According space to space question space first space letter space should space be space straight a space vowel space we space can space choose space any
letter space from space straight A comma straight E comma straight I comma straight O comma straight U. space space we space have space 5 space choices.
For space second space letter space we space can space choose space from space 4 space remaining space vowels space plus space 3 space consonants
bottom enclose bottom enclose 4 end enclose space cross times bottom enclose 7 space cross times bottom enclose 6 space cross times bottom enclose 5 cross times space bottom enclose 4 space equals 4200.



NOTE colon space
We space will space appreciate space if space you space share space your space work space for space the space remaining space questions.
We space love space to space guide space you space further.


end style
Answered by Sneha shidid | 08 Sep, 2017, 01:48: PM

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