what is the sum of all even integers between 99 and 301?
a)20200
b)20000
c)40400
d)40000

• a=100,tn=300
  a+(n-1)d=300=>n=101
  Sn=n/2(a+l)=101/2(100+300)
  Sn=20200
  
• 9 years agoHelpfull: Yes(1) No(0)
• USING AP WE CAN FIND N
  300 = 100+(N-1)2
  N=101
  THEN Sn = 101/2(100+300) = 20200
• 9 years agoHelpfull: Yes(1) No(0)
• A's 2 hours works = 2/8= 1/4
  remaining work= 1- 1/4 = 3/4
  B and C work = 1/10 +1/12 = 11/60
  so, 3/4 * 60/11 === 45/11
  in mixed fraction 4(1/11)
  A's 2 hours works = 2/8= 1/4
  remaining work= 1- 1/4 = 3/4
  B and C work = 1/10 +1/12 = 11/60
  so, 3/4 * 60/11 === 45/11
  in mixed fraction 4(1/11)
  
• 9 years agoHelpfull: Yes(0) No(0)