Let the total flowers in a basket be X.
Jasmine: Roses is 3:7
Number of roses = 21
jasmine = 3/10 of x and roses =7/10 of x ……..(equation1)
we know, number of roses, i.e. = 7/10 of x = 21
therefore,
X = 21*10/7
X= 30
Putting the value of X in equation 1
Jasmine = 3/10 of 30
Jasmine = 9
and
roses = 7/10 of 30
Roses = 21.