Mifcellanea Curlofa. 297 



thefe fourth Terms being added together, and 

 deducted out of the Value of the certain Annui- 

 ty for fo may Years, will leave the Value of 

 the contingent Annuity upon the Chance of Mor- 

 tality of all thole Three Lives. For Example ; 

 Let there be Three Lives of io, 30, and 40 

 Years of Age propoled, and the Proportions will 

 be thus j 



As 661 in 531 in 44? or 15619099?* or Nnv 

 to 8 in 8 in 9, or 576, or Yy w for the firft 



Year, fo 0,9434. to 0,00000348. 

 To 15 in 16 in 18, or 4320, for the fecond 



Year, fo 0,8900. to 0,0000146^. 

 To xi in 24 in 28, or 141 iz for the third 



Year, fo 0,8396. to 0,000081x8. 

 To xj in 3X in 38, for the fourth Year, fo 



0,7911. to 0,0001665:0. 

 To 33 in 41 in 48, for the fifth Year, fo 



°v7473- to 0,00031071. 

 To 39 in 50 in 5*8, for the fixth Year, fo 



0,7050. tO OjOOC^IOjl. 



And fo forth to the 60th Year, when we 

 fuppofe the elder Life of Forty certainly to 

 be expired ; from whence till Seventy we 

 muft compute for the Firft and Second only, 

 and from thence to Ninety for the (ingle 

 youngeft Life. Then the Sum Total of all 

 thefe Fourth Proportionals being taken out of 

 the Value of a certain Annuity for 90 Years, 

 being 16, 58 Years Purchafe, fhall leave the 

 juft Value to be paid for an Annuity during 

 the whole Term of the Lives of Three Per- 

 fons of the Ages propofed. And note, that k 



will 



