The average of three Numbers is 5 if the sum of the frist two numbers is 6 then the third number

2 thoughts on “The average of three Numbers is 5 if the sum of the frist two numbers is 6 then the third number”

1. Answer:

   9 is the third number

   Step-by-step explanation:

   FIRSTLY;

   Let your all three numbers be represented by a variable.

   SO; let’s use x

   because it is 3 numbers, we will have x + x + x

   given 3x.

   BUT;

   sum of first two numbers is 6;

   hence; x + x = 6

   Since we know the first two numbers we will go

   ahead calculating for the third number .

   REMEMBER;

   The third number is also represented by the identical variable ( x )

   Also;

   working with average or mean you must count the number of numbers given and divide it by your result. Example; 2+3+4 will be divided by 3 since when counting your numbers you will get 3 numbers all together

   FURTHERMORE:

   ;

   Our third number is

   sum of first two numbers + x(the variable)/3

   Now;

   we have been given our result as 5 .So; just equate your equation to 5

   thus; 6+x/3 = 5

   L.C.M= 3

   3× 6 + x/3 = 5 × 3

   6 + x = 15

   GROUPING LIKED TERMS

   x = 9

   Hence your third number represented by the variable x is 9.

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2. ᴀɴsᴡᴇʀ :-

   ʟᴇᴛ 1sᴛ ɴᴜᴍʙᴇʀ ʙᴇ “ᴀ”

   2ɴᴅ ɴᴏᴜᴍʙᴇʀ ʙᴇ “ʙ”

   3ʀᴅ ɴᴜᴍʙᴇʀ ʙᴇ “ᴄ”

   ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜᴇ ǫᴜᴇsᴛɪᴏɴ :-

   ᴀ + ʙ + ᴄ / 3 = 5

   ᴀ + ʙ + ᴄ = 15 ..(1 ᴇǫ)

   ɢɪᴠᴇɴ :-

   ᴀ + ʙ = 6 ..(2 ᴇǫ)

   ʙʏ ᴇǫ 1 ᴀɴᴅ 2

   6 + ᴄ = 15

   ᴄ= 9

   ____________________

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