In a science test devi scores 15 marks more than lixin . if devi obtains twice as many marks as lexin . find the number of marks lixin obtains.

15

Step-by-step explanation:

D=2l

D=l+15

Substitute

2l=l+15

L=15

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: