Question
In the Lakme annual sale, Disha, in order to keep her expenses in control, decided to buy 20 beauty products from nail polishes, lipsticks, eye-liners and eye-shadows, selecting atleast one from each. In how many ways can she make this selection?
Answer: Option C
:
C
Option(c)
This is S -> D type of grouping with a lower limit of 1
N+L+EL+ES= 20
N,L,EL,ES≥ 1
Removing 4 from each side
N+L+EL+ES=16
Now, N, L, EL, ES≥ 0
This is the arrangement of 16 zeroes and 3 ones. Answer = 19C3
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:
C
Option(c)
This is S -> D type of grouping with a lower limit of 1
N+L+EL+ES= 20
N,L,EL,ES≥ 1
Removing 4 from each side
N+L+EL+ES=16
Now, N, L, EL, ES≥ 0
This is the arrangement of 16 zeroes and 3 ones. Answer = 19C3
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