Suriin ang IDNStudy.com para sa mabilis na mga solusyon sa iyong mga problema. Sumali sa aming platform ng tanong at sagot upang makakuha ng eksaktong tugon sa lahat ng iyong mahahalagang tanong.

Find the number of distinguishable permutations of the letters of the word WELL.

A. 4
B. 12
C. 36
D. 144​


Sagot :

[tex] \large\underline \bold{{SOLUTION}}[/tex]

Let n be the total of letters and r be the times of repeated letter is.

[tex]\longmapsto\rm{P_n= \frac{n!}{(r!)(r!)(r!)}}[/tex]

[tex]\longmapsto\rm{P_4=\frac{4!}{(1!)(1!)(2!)}}[/tex]

[tex]\longmapsto\rm{P_4=\frac{4×3×2×1}{(1)(1)(2×1)}}[/tex]

[tex]\longmapsto\rm{P_4=\frac{4×3×\cancel{2×1}}{(\cancel{1)(1)(2×1})}}[/tex]

[tex]\longmapsto\rm{P_4=4×3}[/tex]

[tex]\longmapsto\boxed{\rm{P_4=12}}[/tex]

[tex] \large\underline{ \bold{ANSWER}}[/tex]

  • OPTION B (12)