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- Question 4 and 5, Exercise 6.2
- ** Solution. ** We have to sue $3$ digits out of given $6$ digits to make a F3-digit number.\\ To ensure... e have to arrange $6$ digits out of $9$ remaining given digits.\\ Possible arrangements $={ }^{9} P_{6}=6
- Exercise 6.1 (Solutions)
- s Federal Textbook Board, Islamabad, Pakistan are given on this page. This exercise consists of the quest
- Exercise 6.2 (Solutions)
- s Federal Textbook Board, Islamabad, Pakistan are given on this page. This exercise consists of the quest
- Question 6 and 7, Exercise 6.2
- peated? ** Solution. ** Total number of digits given $=7$.\\ Even places are $2^{\text {nd }}$, fourth
- Question 12 and 13, Exercise 6.2
- hese $5$ letters $=5!=120$\\ Vowel letters in the given word are ' $O$ ' and ' $E$ '.\\ Out of five, seco
- Question 14 and 15, Exercise 6.2
- s not allowed. ** Solution. ** Total letters of given word $=7$\\ No. of letters we can use to make wor
- Question 18 and 19, Exercise 6.2
- Odd number ending at $3$ using $4$ digits out of given $5$ digits $={ }^{4} P_{3}=2$\\ $4$ digit odd nu
- Question 22 and 23, Exercise 6.2
- . ** $(4,6,3,2,1,5)$ mean place first letter of given word at $4^{\text {th }}$ position,\\ place $2^{\
- Exercise 6.3 (Solutions)
- s Federal Textbook Board, Islamabad, Pakistan are given on this page. This exercise consists of the quest
- Question 11 and 12, Exercise 6.3
- $35$. Find the number $n$? ** Solution. ** So given that \begin{align*}{ }^{n} C_{2}-n&=35\\ \text{or
- Question 4, 5 and 6, Review Exercise 6
- ** Solution. ** Total possible permutations of given $6$ digits $$=6!=720$$ Permutations starting with
- Review Exercise (Solutions)
- s Federal Textbook Board, Islamabad, Pakistan are given on this page. **Question 1.** Select the best