If 28a+30b+31c = 365 then value of a+b+c = ?
1. 11
2. <11
3. >13
4. 12

• As feb -> 28 days so 1 month.
  
  jan,march,may,july,aug,oct,dec-> 31 days..so..7 months
  
  apr,jun,sep,nov->30 days... so.. 4 months
  
  a=1
  b=7
  c=4
  
  a+b+c=12
• 9 years agoHelpfull: Yes(23) No(1)
• its 12
  coz feb has 28 days
  4 months have 30 days
  nd 7 have 31 days
  so
  28*1+30*4+31*7=365
  where 365 is num of days in year
  so a+b+c=12
• 9 years agoHelpfull: Yes(4) No(0)
• In the above question we can consider that the variables a,b,c as no. of days of a month. So in a year no. of months containing 28 days =1 ie a=1,similarly b=4,c=7 .therefore a+b+c=1+4+7=12
• 9 years agoHelpfull: Yes(3) No(0)
• 28, 30,31 are the total days in a month.
  365 is the total days in a year.
  then, a+b+c is the total months in a year =12
• 9 years agoHelpfull: Yes(1) No(0)
• 28 is the no. of days in february . therefor a = 1
  30 is the no. of days of 4 months i.e(april, june, sept , nov) b=4
  31 is the no. of days of 7 months .i.e( jan,march,may,july,august,oct.,dec) c= 7
  
  so, A+B+C= 1+4+7= 12 ans.
• 9 years agoHelpfull: Yes(1) No(0)
• As here given that total sum is 365. also ,we know that in 1 year total no of days =365
  so,
  feb=28
  30 days=april,june,sept,nov , 4 months
  31 days=jan, march, may,july, aug, oct, dec. 7 months
  hence, a+b+c=1+4+7
  =12
  
• 9 years agoHelpfull: Yes(1) No(0)
• here February had 28 days..
  so... 30 day *4
  and 31 *7
  so we have total 12 months and in which 4 month had 30 day and 7 month have 31 days
  and. is 12.
• 9 years agoHelpfull: Yes(0) No(0)
• option-4
  Number of months having 28 days = 1
  Number of months having 30 days = 4
  Number of months having 31 days = 7
  28 x 1 + 30 x 4 + 31 x 7 = 365
  Here, a = 1, b = 4, c = 7.
  
  a+b+c = 12
  
• 9 years agoHelpfull: Yes(0) No(0)
• 12
  365 days=12months
• 9 years agoHelpfull: Yes(0) No(0)
• answer is 12. we have to consider this as month and year....... 365 is an ordinary year. there are 28 days in feb. so 2+4+6=12
• 9 years agoHelpfull: Yes(0) No(0)
• 12..................
• 9 years agoHelpfull: Yes(0) No(0)
• jan,march,may,july,aug,oct,dec-> 31 days..so..7 months
  
  apr,jun,sep,nov->30 days... so.. 4 months
  a=1
  b=7
  c=4
  a+b+c=12
• 9 years agoHelpfull: Yes(0) No(0)
• 28a+30b+31c=365 .
  it can be written as 28*(a+b+c)+(b+2c)=365
  28*13+1=365
  or28*12+29=365
  as b+2c cannot be equal to 1,therefore (a+b+c)=12,
  if we consider a,b,c as '+' integers.
• 9 years agoHelpfull: Yes(0) No(0)
• If we notice this question, we cn understand the logic. There is 365 which is a total year. Now look at d terms 28,30,31. These may be number of days in month.
  We have to calculate how many months are there which have 28,30,31 days. So easily we get (28*1)+(30*4)+(31*7)=365. So a+b+c=(1+4+7)=12.
  
• 9 years agoHelpfull: Yes(0) No(0)
• Answer is 4. 12
  28*1+30*4+31*7=365,
  so a=1,b=4,c=7 => a+b+c=1+4+7=12
• 9 years agoHelpfull: Yes(0) No(0)
• a=1,b=5,c=6
  a+b+c=11
  since it is the format of year given only one month have 28 day ,6 month have 31 day and 5 month have 30 day
• 9 years agoHelpfull: Yes(0) No(1)