a sum of Rs 700 is to be used to give seven cash prizes to student of a school for their overall academic performance. If each prize is Rs.20 less than its preceeding prize. find the value of each of the prizes.
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here is your answer OK ⛲⛲⛲⛲⛲
S=700 d = -20 n=7
by using formula
S=n/2 (2a +(n-1)d )
700 =7/2 ( 2a+( 6)-20)
1400= 7(2A -120)
1400= 14a - 840)
1400+840 =14a
2240=14a
a=2240/14 =160
A2= 160-20=140 thus we find the preceding terms
so the value of first prize is RS 160 ,second RS 140, third RS 120 ,fourth RS 100, fifth RS 80, sixth RS 60 ,seventh rs 40
S=700 d = -20 n=7
by using formula
S=n/2 (2a +(n-1)d )
700 =7/2 ( 2a+( 6)-20)
1400= 7(2A -120)
1400= 14a - 840)
1400+840 =14a
2240=14a
a=2240/14 =160
A2= 160-20=140 thus we find the preceding terms
so the value of first prize is RS 160 ,second RS 140, third RS 120 ,fourth RS 100, fifth RS 80, sixth RS 60 ,seventh rs 40
Answered by
2
Answer:
A2 = 140
Step-by-step explanation:
happy to help u friend
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