There are TWELVE (12) 3 cent stamps in a dozen. Just like there are 12 in a dozen of anything and everything else (unless we're talking baker's dozen!)
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In a dozen, there are 12 items. To calculate how many 3-cent stamps are in a dozen, you would multiply the number of items (12) by the value of each item (3 cents). Therefore, there are 36 cents worth of 3-cent stamps in a dozen.
Well honey, a dozen is 12, so if you're looking for 3 cent stamps in a dozen, you're gonna need 4 of 'em. Simple math, darling. Just make sure you don't lick 'em all at once.
Let ' T ' = the number of 3-cent stamps. Furthermore, let ' F ' = the number of 5-cent stamps. T + F = 51, ===> so F = 51 - T 3T + 5F = 223 3T + 5(51-T) = 223 3T + 255 - 5T = 223 -2T = -32 T = 16 ===> so F = 35
Making Postage: Mak found more than 50 3-cent and 5-cent stamps in a desk. His uncle needed 87¢ worth of postage to mail a package and asked Mak if he could use some of these stamps. How many different combinations of the stamps could Mak give his uncle to make exactly 87¢ of postage.???????
3/4 dozen or 0.75 dozen.
5 cent
36 makes 3 dozen