Krygdidn
Answered

Sumali sa komunidad ng IDNStudy.com at simulang makuha ang mga sagot na kailangan mo. Magtanong at makakuha ng detalyadong sagot mula sa aming komunidad ng mga eksperto.

how many 3-digit numbers can be formed out of the numbers 4 5 6 7 8 9?​

Sagot :

Fretfulidn

Answer:

For the hundereds digit, there are 3 possibilities i.e 4,5 or 6——(1)

For the ten digit, there are 2 possibilities [As one of the numbers has been used for the ones digit]——(2)

For the hundereds digit, there is 1 possibility [As 2 digits have been used for Hundereds and tens]——(3)

Therefore, The number of digits without repetition is 3*2*1=6

With repetition is 3*3*3=27